Cheap flights from St. Louis to Idaho Falls (STL - IDA) from $252

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/11. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
STL — IDA
May 9 — May 161

Cheap flight deals from St. Louis to Idaho Falls

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Idaho Falls (IDA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 4, 2024.

Popular in

June

Cheapest in

February

Round-trip from

$397

One-way from

$297
High demand for flights, 21% potential price rise
Best time to find cheap flights, 32% potential price drop
From Lambert-St Louis to Idaho Falls Fanning Field
One-way flight from Lambert-St Louis to Idaho Falls Fanning Field

What is the cheapest day to fly round-trip from St. Louis to Idaho Falls?

Users have found that leaving on a Monday can be a cost-effective option. It’s possible to save up to 54% on your flight compared to booking on days when demand is much higher.

What is the cheapest month to fly from St. Louis to Idaho Falls?

Our data shows that February tends to be the cheapest month to fly to Idaho Falls from St. Louis. Users have commonly found prices around $612 for the month, but tickets can be as low as $313. Due to multiple factors, prepare for potentially higher prices in June.

When is the cheapest time to fly from St. Louis to Idaho Falls (STL - IDA)?

A simple way to save on the total cost of your ticket is to fly from St. Louis to Idaho Falls in the morning. If you’re flexible enough to do this you can expect to save up to 10% on your trip compared to booking a flight at noon.

Cheap United Airlines flights from St. Louis to Idaho Falls

Explore cheap flight options specifically provided by United Airlines for the route between St. Louis and Idaho Falls. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,795,183 searches. Data last updated May 4, 2024.
Find some of the cheapest United Airlines flights traveling from St. Louis to Idaho Falls. Come back soon if you're not finding the exact deal you're looking for.
Fri 5/314:45 pmSTL - IDA
1 stop25h 30mUnited Airlines
Tue 6/45:56 pmIDA - STL
1 stop25h 53mUnited Airlines
Deal found 5/4$546
Thu 7/49:08 amSTL - IDA
1 stop13h 00mUnited Airlines
Fri 7/125:58 pmIDA - STL
2 stops19h 38mUnited Airlines
Deal found 5/3$560
Fri 5/314:45 pmSTL - IDA
1 stop25h 30mUnited Airlines
Tue 6/45:56 pmIDA - STL
2 stops20h 45mUnited Airlines
Deal found 5/4$571
Fri 10/114:55 pmSTL - IDA
1 stop25h 20mUnited Airlines
Tue 10/155:40 pmIDA - STL
1 stop21h 50mUnited Airlines
Deal found 5/4$575
Fri 10/114:55 pmSTL - IDA
1 stop17h 49mUnited Airlines
Tue 10/155:40 pmIDA - STL
2 stops20h 08mUnited Airlines
Deal found 5/4$580
Thu 7/49:08 amSTL - IDA
1 stop13h 00mUnited Airlines
Fri 7/125:58 pmIDA - STL
1 stop27h 22mUnited Airlines
Deal found 5/3$584
Thu 7/45:30 pmSTL - IDA
2 stops28h 38mUnited Airlines
Fri 7/125:58 pmIDA - STL
2 stops19h 38mUnited Airlines
Deal found 5/3$600
Fri 10/115:34 pmSTL - IDA
2 stops17h 10mUnited Airlines
Tue 10/155:40 pmIDA - STL
2 stops20h 08mUnited Airlines
Deal found 5/4$660
Thu 7/255:30 pmSTL - IDA
2 stops24h 47mUnited Airlines
Mon 7/295:58 pmIDA - STL
1 stop27h 13mUnited Airlines
Deal found 5/4$680

Cheap Delta flights from St. Louis to Idaho Falls

Explore cheap flight options specifically provided by Delta for the route between St. Louis and Idaho Falls. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,795,183 searches. Data last updated May 4, 2024.
Some of the lowest-priced Delta flights we've found at this time heading from St. Louis to Idaho Falls. Deals frequently update to provide users with more options.
Fri 6/286:25 pmSTL - IDA
1 stop4h 52mDelta
Mon 7/87:00 pmIDA - STL
1 stop4h 39mDelta
Deal found 5/4$576
Sat 6/811:25 amSTL - IDA
2 stops11h 52mDelta
Mon 6/107:00 pmIDA - STL
1 stop4h 58mDelta
Deal found 5/3$581
Sat 6/811:25 amSTL - IDA
2 stops11h 52mDelta
Mon 6/107:00 pmIDA - STL
2 stops13h 15mDelta
Deal found 5/3$586
Sun 6/96:30 amSTL - IDA
2 stops16h 47mDelta
Mon 6/107:00 pmIDA - STL
1 stop4h 58mDelta
Deal found 5/3$705
Fri 6/2811:25 amSTL - IDA
2 stops11h 52mDelta
Mon 7/87:00 pmIDA - STL
1 stop4h 39mDelta
Deal found 5/4$755
Mon 6/107:55 amSTL - IDA
1 stop5h 27mDelta
Mon 6/107:00 pmIDA - STL
2 stops17h 15mDelta
Deal found 5/3$1,027

Cheap St. Louis to Idaho Falls flights in May & June 2024

Find cheap flight options from St. Louis to Idaho Falls specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,795,183 searches. Prices were last updated on May 4, 2024.
Check out some of the best flight deals from St. Louis to Idaho Falls in 2024. Check back in a little while for more flight options.
Fri 5/314:45 pmSTL - IDA
1 stop25h 30mUnited Airlines
Tue 6/45:56 pmIDA - STL
1 stop25h 53mUnited Airlines
Deal found 5/4$546
Fri 5/314:45 pmSTL - IDA
1 stop25h 30mUnited Airlines
Tue 6/45:56 pmIDA - STL
2 stops20h 45mUnited Airlines
Deal found 5/4$571
Fri 6/286:25 pmSTL - IDA
1 stop4h 52mDelta
Mon 7/87:00 pmIDA - STL
1 stop4h 39mDelta
Deal found 5/4$576
Sat 6/811:25 amSTL - IDA
2 stops11h 52mDelta
Mon 6/107:00 pmIDA - STL
1 stop4h 58mDelta
Deal found 5/3$581
Sat 6/811:25 amSTL - IDA
2 stops11h 52mDelta
Mon 6/107:00 pmIDA - STL
2 stops13h 15mDelta
Deal found 5/3$586
Sun 6/97:00 amSTL - IDA
1 stop17h 57mAlaska Airlines
Mon 6/103:32 pmIDA - STL
1 stop21h 04mAlaska Airlines
Deal found 5/3$622
Sat 6/87:00 amSTL - IDA
1 stop8h 52mAlaska Airlines
Mon 6/103:32 pmIDA - STL
1 stop21h 04mAlaska Airlines
Deal found 5/3$652
Fri 5/316:15 amSTL - IDA
2 stops15h 53mUnited Airlines
Tue 6/45:56 pmIDA - STL
2 stops20h 45mUnited Airlines
Deal found 5/4$703
Sun 6/96:30 amSTL - IDA
2 stops16h 47mDelta
Mon 6/107:00 pmIDA - STL
1 stop4h 58mDelta
Deal found 5/3$705

St. Louis to Idaho Falls 2024 flight deals

Discover exclusive flight deals for travel between St. Louis and Idaho Falls in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,795,183 searches. Data last updated May 4, 2024.
Check out some of the best flight deals from St. Louis to Idaho Falls in 2024. Check back in a little while for more flight options.
Fri 5/314:45 pmSTL - IDA
1 stop25h 30mUnited Airlines
Tue 6/45:56 pmIDA - STL
1 stop25h 53mUnited Airlines
Deal found 5/4$546
Thu 7/49:08 amSTL - IDA
1 stop13h 00mUnited Airlines
Fri 7/125:58 pmIDA - STL
2 stops19h 38mUnited Airlines
Deal found 5/3$560
Fri 5/314:45 pmSTL - IDA
1 stop25h 30mUnited Airlines
Tue 6/45:56 pmIDA - STL
2 stops20h 45mUnited Airlines
Deal found 5/4$571
Fri 10/114:55 pmSTL - IDA
1 stop25h 20mUnited Airlines
Tue 10/155:40 pmIDA - STL
1 stop21h 50mUnited Airlines
Deal found 5/4$575
Fri 6/286:25 pmSTL - IDA
1 stop4h 52mDelta
Mon 7/87:00 pmIDA - STL
1 stop4h 39mDelta
Deal found 5/4$576
Fri 10/114:55 pmSTL - IDA
1 stop17h 49mUnited Airlines
Tue 10/155:40 pmIDA - STL
2 stops20h 08mUnited Airlines
Deal found 5/4$580
Sat 6/811:25 amSTL - IDA
2 stops11h 52mDelta
Mon 6/107:00 pmIDA - STL
1 stop4h 58mDelta
Deal found 5/3$581
Thu 7/49:08 amSTL - IDA
1 stop13h 00mUnited Airlines
Fri 7/125:58 pmIDA - STL
1 stop27h 22mUnited Airlines
Deal found 5/3$584
Sat 6/811:25 amSTL - IDA
2 stops11h 52mDelta
Mon 6/107:00 pmIDA - STL
2 stops13h 15mDelta
Deal found 5/3$586

One-way flights to Idaho Falls from St. Louis

Search for one-way flight options from St. Louis to Idaho Falls. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,795,183 searches. Data last updated May 4, 2024.
Some of the best available deals we've found on one-way flights from St. Louis to Idaho Falls. Those seeking round-trip flights from St. Louis to Idaho Falls should utilize the search form at the the top of the page.
Tue 6/112:36 pmSTL - IDA
1 stop10h 21mAlaska Airlines
Deal found 5/3$252
Sat 6/89:05 amSTL - IDA
1 stop9h 10mUnited Airlines
Deal found 5/3$269
Mon 6/107:41 pmSTL - IDA
1 stop29h 16mAlaska Airlines
Deal found 5/3$272
Fri 6/77:41 pmSTL - IDA
1 stop20h 11mAlaska Airlines
Deal found 5/3$277
Mon 6/106:25 pmSTL - IDA
1 stop4h 52mDelta
Deal found 5/3$288
Wed 5/227:55 amSTL - IDA
1 stop5h 33mDelta
Deal found 5/2$289
Fri 6/711:25 amSTL - IDA
2 stops11h 52mDelta
Deal found 5/3$293
Sun 6/97:41 pmSTL - IDA
1 stop29h 16mAlaska Airlines
Deal found 5/3$297
Thu 7/41:45 pmSTL - IDA
1 stop8h 23mUnited Airlines
Deal found 5/3$298

Find flights from St. Louis to Idaho Falls within your budget

Customize your flight search to find flights from St. Louis to Idaho Falls that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,795,183 searches. Data last updated May 4, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$546 - $652

Route

Depart

Return

Price

Lambert-St LouisIdaho Falls Fanning Field

STL - IDA

STLIDA

Lambert-St Louis

Fri 5/31

1 stop25h 30m

Idaho Falls Fanning Field

Tue 6/4

1 stop25h 53m

$546

Lambert-St LouisIdaho Falls Fanning Field

STL - IDA

STLIDA

Lambert-St Louis

Thu 7/4

1 stop13h 00m

Idaho Falls Fanning Field

Fri 7/12

2 stops19h 38m

$560

Lambert-St LouisIdaho Falls Fanning Field

STL - IDA

STLIDA

Lambert-St Louis

Fri 5/31

1 stop25h 30m

Idaho Falls Fanning Field

Tue 6/4

2 stops20h 45m

$571

Lambert-St LouisIdaho Falls Fanning Field

STL - IDA

STLIDA

Lambert-St Louis

Fri 10/11

1 stop25h 20m

Idaho Falls Fanning Field

Tue 10/15

1 stop21h 50m

$575

Lambert-St LouisIdaho Falls Fanning Field

STL - IDA

STLIDA

Lambert-St Louis

Fri 6/28

1 stop4h 52m

Idaho Falls Fanning Field

Mon 7/8

1 stop4h 39m

$576

Lambert-St LouisIdaho Falls Fanning Field

STL - IDA

STLIDA

Lambert-St Louis

Sat 6/8

2 stops11h 52m

Idaho Falls Fanning Field

Mon 6/10

1 stop4h 58m

$581

Lambert-St LouisIdaho Falls Fanning Field

STL - IDA

STLIDA

Lambert-St Louis

Sat 6/8

2 stops11h 52m

Idaho Falls Fanning Field

Mon 6/10

2 stops13h 15m

$586

Lambert-St LouisIdaho Falls Fanning Field

STL - IDA

STLIDA

Lambert-St Louis

Sun 6/9

1 stop17h 57m

Idaho Falls Fanning Field

Mon 6/10

1 stop21h 04m

$622

Lambert-St LouisIdaho Falls Fanning Field

STL - IDA

STLIDA

Lambert-St Louis

Sat 6/8

1 stop8h 52m

Idaho Falls Fanning Field

Mon 6/10

1 stop21h 04m

$652

Flights are sorted by cheapest first

Deals found on 5/4

When is the cheapest time to fly from St. Louis to Idaho Falls?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Idaho Falls. Price data was last updated on April 28, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their St. Louis to Idaho Falls flight should consider departing on Tuesday mornings when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Average price of flights to Idaho Falls by month

Plan your trip from St. Louis to Idaho Falls by taking into account the cheapest months to travel. The average price of a one-way flight from St. Louis to Idaho Falls is currently $282 while a round-trip flight costs $585. Price data was last updated on April 28, 2024.

Currently, December is the cheapest month in which you can book a flight from St. Louis to Idaho Falls (average of $397). Flying from St. Louis to Idaho Falls in July is currently the most expensive (average of $622). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

January

$469

February

$446

March

$535

April

$467

May

$494

June

$614

July

$622

August

$555

September

$532

October

$485

November

$456

December

$397

Temperature and rainfall in Idaho Falls by month

Plan your trip to Idaho Falls by taking into account the average temperature and rainfall totals by month.

IDA

Temperature

23 - 69.8 °F

Reviews of airlines servicing Idaho Falls

Get insights into the airlines that provide service to Idaho Falls. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Idaho Falls. Reviews last updated May 4, 2024.
Read reviews from past customers who have flown United Airlines, Delta and Alaska Airlines from St. Louis to Idaho Falls. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.1
Very good
9,137 reviews

Boarding

8.2

Entertainment

7.3

Crew

8.6

Overall

8.1

Comfort

7.9

Food

7.3

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

8.1
Very good
9,137 reviews
8.1
Very good
9,137 reviews

Boarding

8.2

Entertainment

7.3

Crew

8.6

Overall

8.1

Comfort

7.9

Food

7.3

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

8.1
Very good
10,838 reviews
8.1
Very good
9,137 reviews

Boarding

8.2

Entertainment

7.3

Crew

8.6

Overall

8.1

Comfort

7.9

Food

7.3

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

7.4
Good
11,125 reviews
8.1
Very good
9,137 reviews

Boarding

8.2

Entertainment

7.3

Crew

8.6

Overall

8.1

Comfort

7.9

Food

7.3

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Idaho Falls. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • Can I find flights from St. Louis to Idaho Falls for under $600 on Cheapflights?

    Yes, there are multiple flights from St. Louis to Idaho Falls for under $600. The cheapest flight booked recently is on United Airlines for just $546, but on average you can expect to pay $666.

  • What are the cheapest airlines flying from St. Louis to Idaho Falls round-trip?

    United Airlines, at $546, was found to be the cheapest airline from St. Louis to Idaho Falls.Alternate airlines to your destination round-trip include Delta and Alaska Airlines. United Airlines is priced at 10% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from St. Louis to Idaho Falls one-way?

    To fly one-way, consider booking your trip with Alaska Airlines, which is currently one of the cheapest options available, starting at $252. United Airlines flights start at $269 while deals on Delta start at $288 one-way.

  • What does STL to IDA mean?

    STL and IDA are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. STL to IDA refers to a flight route from Lambert-St Louis Airport to Idaho Falls Fanning Field Airport.

  • Can I find deals for flights from St. Louis to Idaho Falls that include extra baggage allowance?

    The amount of baggage you can bring on your St. Louis to Idaho Falls flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from St. Louis to Idaho Falls with specific airlines?

    Yes, Cheapflights allows you to browse and filter St. Louis to Idaho Falls flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from St. Louis to Idaho Falls that include hotel bookings?

    Yes. In addition to deals on St. Louis to Idaho Falls flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Idaho Falls?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Idaho Falls.

  • Can I find deals for business class flights from St. Louis to Idaho Falls?

    Yes. Cheapflights offers flight deals from St. Louis to Idaho Falls by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from St. Louis to Idaho Falls that allow pets onboard?

    Many airlines flying from St. Louis to Idaho Falls offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from St. Louis to Idaho Falls?

    Yes, you can often find last-minute deals on St. Louis to Idaho Falls flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the St. Louis to Idaho Falls flight deals updated?

    The St. Louis to Idaho Falls flight deals you see on this page were last updated on 5/4.

See more FAQs

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Top 2 airlines flying from St. Louis to Idaho Falls

Discover the top 2 airlines that operate flights from St. Louis to Idaho Falls. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,795,183 searches. Data last updated May 4, 2024.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$338Average$618FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapest$413Average$616FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Search flights from St. Louis to Idaho Falls by cabin class

Find flights from St. Louis to Idaho Falls, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from St. Louis to Idaho Falls?

When you search for this flight from St. Louis to Idaho Falls, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from St. Louis to Idaho Falls?

Cheapflights helps you find that perfect flight to Idaho Falls from St. Louis by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from St. Louis to Idaho Falls with no change fees?

Certainly. Search results for flights to Idaho Falls from St. Louis shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from St. Louis to Idaho Falls become cheaper?

Yes! Start tracking prices for St. Louis to Idaho Falls flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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