Question 1

What days are nonstop flights available from San Francisco to Boulder?

Accepted Answer

Nonstop flights can be found on the following days: Sunday, Monday, Wednesday, Thursday, Friday, Saturday.

Question 2

How popular is this San Francisco to Boulder flight route?

Accepted Answer

This flight path from San Francisco to Boulder was viewed by 257 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

Question 3

How many flights depart from San Francisco to Boulder on average per day?

Accepted Answer

24 flight departures from San Francisco to Boulder per day on average.
Morning (6am - Noon) - 25% of flight departures
Afternoon (Noon - 6pm) - 38% of flight departures
Evening (6pm - Midnight) - 38% of flight departures

Question 4

How long is the flight from San Francisco to Boulder?

Accepted Answer

Airlines like Frontier fly from San Francisco to Boulder in about 2h 36m. The time it takes to get you to your destination is usually consistent. There are 970 mi between San Francisco and Boulder. Most flights are nonstop.

Question 5

What are the cheapest airlines to fly from San Francisco to Boulder one-way?

Accepted Answer

For one-way options, check prices for Frontier. According to our data, you can fly for as low as $42. Users have also found prices from $79 and $98 on Sun Country Air and Delta, respectively.

Question 6

E

Accepted Answer

Currently, December is the cheapest month in which you can book a flight from San Francisco to Boulder (average of $192). Flying from San Francisco to Boulder in June is currently the most expensive (average of $280). 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

$220

February

$237

March

$269

April

$204

May

$224

June

$280

July

$278

August

$218

September

$212

October

$193

November

$198

December

$192

Question 7

When is the best time to book a flight from San Francisco to Boulder?

Accepted Answer

Booking 59 days in advance of your planned departure date is, on average, the best time to get cheap flights from San Francisco to Boulder. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Question 8

When is the cheapest time to fly from San Francisco to Boulder?

Accepted Answer

Travelers seeking maximum savings on their San Francisco to Boulder flight should consider departing on Tuesday evenings when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Question 9

How recently were the San Francisco to Boulder flight deals updated?

Accepted Answer

The San Francisco to Boulder flight deals you see on this page were last updated on 5/8.

Question 10

What are the most popular airlines that fly from San Francisco to Boulder?

Accepted Answer

Consider American Airlines, Alaska Airlines or Delta when booking your flight. These represent the most popular airlines when flying from San Francisco to Boulder.

Question 11

What are the cheapest flights from San Francisco to Boulder?

Accepted Answer

The cheapest flight price from San Francisco to Boulder is $46. On average you can expect to pay $922. The most popular route, (San Francisco - Denver Intl), can usually be booked for $115.

Question 12

What are the most reliable airlines from San Francisco to Boulder?

Accepted Answer

Consider Emirates (87%), Virgin Australia (85%) or Avianca (85%) when booking your flight. These represent the most reliable airlines when flying from San Francisco to Boulder.

Question 13

Can I find flights from San Francisco to Boulder for under $100 on Cheapflights?

Accepted Answer

Yes, there are multiple flights from San Francisco to Boulder for under $100. The cheapest flight booked recently is on Frontier for just $58, but on average you can expect to pay $75.

Question 14

Are there nonstop flights from San Francisco to Boulder for under $100 on Cheapflights?

Accepted Answer

Cheapflights has at least 20 direct flights from San Francisco to Boulder under $100. A good price for a nonstop flight from San Francisco to Boulder is less than $75.

Question 15

Are there last-minute flights available from San Francisco to Boulder for under $100?

Accepted Answer

There are currently 20+ open flights from San Francisco to Boulder within the next 7 days for less than $100.

Question 16

How far in advance should I book a flight from San Francisco to Boulder?

Accepted Answer

To save up to 68% on this flight, we recommend booking at least 60 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from San Francisco to Boulder from $178 1-2 weeks out and tickets from $307 for flights departing within the next 72 hours.

Question 17

What is the cheapest month to fly from San Francisco to Boulder?

Accepted Answer

January is one of the best times of the year to fly to Boulder from San Francisco. Prices for January average $203 per person but you can even find prices for as low as $65. The most expensive prices can be found in the month of June. Opting for a January flight can save you 32% on your journey compared to booking in June

Question 18

When is the cheapest time to fly from San Francisco to Boulder (SFO - BD9)?

Accepted Answer

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from San Francisco to Boulder as you normally would.

Question 19

What airport do you fly from for flights from San Francisco to Boulder?

Accepted Answer

Located just 11.8 mi from the city center, San Francisco is the airport most travelers will use when flying to Boulder from San Francisco. Booking flights from San Francisco (SFO) to Boulder should be relatively easy as there are 42 daily outbound flights to Boulder from 7 different airlines.

Question 20

What does SFO to DEN mean?

Accepted Answer

Great question - SFO to DEN just means San Francisco Airport to Denver Intl Airport. Now you’ll know what these unique codes when you look for flights! Colorado Springs Airport (COS), Vail Eagle County Airport (EGE), Cheyenne Airport (CYS), Denver Arapahoe Co Airport (APA), Loveland Northern Colorado Airport (FNL) are some additional IATA codes for airports related to your trip.

Question 21

Can I find deals for flights from San Francisco to Boulder that include extra baggage allowance?

Accepted Answer

The amount of baggage you can bring on your San Francisco to Boulder 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.

Question 22

Can I find deals on flights from San Francisco to Boulder with specific airlines?

Accepted Answer

Yes, Cheapflights allows you to browse and filter San Francisco to Boulder flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

Question 23

Can I find deals for flights from San Francisco to Boulder that include hotel bookings?

Accepted Answer

Yes. In addition to deals on San Francisco to Boulder flights, Cheapflights offers vacation packages that include both flights and hotel.

Question 24

How can I find direct flights from San Francisco to Boulder?

Accepted Answer

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to Boulder.

Question 25

Can I find deals for business class flights from San Francisco to Boulder?

Accepted Answer

Yes. Cheapflights offers flight deals from San Francisco to Boulder by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Question 26

Can I find deals for flights from San Francisco to Boulder that allow pets onboard?

Accepted Answer

Many airlines flying from San Francisco to Boulder 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.

Question 27

Can I find deals on last-minute flights from San Francisco to Boulder?

Accepted Answer

Yes, you can often find last-minute deals on San Francisco to Boulder 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.

Question 28

How does Cheapflights help users find flights from San Francisco to Boulder?

Accepted Answer

When you search for this flight from San Francisco to Boulder, 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.

Question 29

Why should you use Cheapflights to find cheap flight tickets from San Francisco to Boulder?

Accepted Answer

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Boulder from San Francisco.

Question 30

Can Cheapflights find flights from San Francisco to Boulder with no change fees?

Accepted Answer

Yes! Cheapflights helps users easily find flights from San Francisco to Boulder with no change fees.

Question 31

Can Cheapflights notify me if prices for flights from San Francisco to Boulder become cheaper?

Accepted Answer

Yes! Start tracking prices for San Francisco to Boulder 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.

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$40	Average$172	FlexibilityNo cancel fee	On-time65%	Search Spirit Airlines flights
Frontier	Cheapest$55	Average$136	FlexibilityNo cancel fee	On-time62%	Search Frontier flights
Delta	Cheapest$114	Average$379	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
Alaska Airlines	Cheapest$123	Average$424	FlexibilityNo cancel fee	On-time75%	Search Alaska Airlines flights
United Airlines	Cheapest$139	Average$454	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
American Airlines	Cheapest$197	Average$482	FlexibilityNo cancel fee	On-time71%	Search American Airlines flights

23%of flight departures	Early morningMidnight to 6 am
34%of flight departures	Morning6 am to noon
33%of flight departures	AfternoonNoon to 6 pm
10%of flight departures	Evening6 pm to midnight

Popular in	June
Cheapest in	January
Round-trip from	$192
One-way from	$79

Sunday	33daily flights
Monday	46daily flights
Tuesday	43daily flights
Wednesday	41daily flights
Thursday	45daily flights
Friday	45daily flights
Saturday	42daily flights

Cheap flights from San Francisco (SFO) to Boulder, CO from $42

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 6/1. 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.

The best prices from San Francisco to Boulder are usually found in January or October, booked 59 days in advance, depart on a Wednesday or Tuesday and return on a Saturday

Cheap flight deals from San Francisco to Boulder

Popular in

Cheapest in

Round-trip from

One-way from

How far in advance should I book a flight from San Francisco to Boulder?

What is the cheapest month to fly from San Francisco to Boulder?

When is the cheapest time to fly from San Francisco to Boulder (SFO - BD9)?

Cheap Frontier flights from San Francisco to Boulder

Take a peek at the cheapest Frontier flights we've detected traveling from San Francisco to Boulder. Make sure to check back often as deals are often changing.

Cheap United Airlines flights from San Francisco to Boulder

Some of the best deals we've found on United Airlines flights traveling from San Francisco to Boulder. Deals frequently update to provide users with more options.

Cheap San Francisco to Boulder flights in May & June 2024

Find cheap flight options from San Francisco to Boulder specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,752,338 searches. Prices were last updated on mayo 8, 2024.

These are some of the best deals we've found on flights to Boulder in 2024 at this time. If these deals don't appeal to you, be sure to come back soon for more options.

San Francisco to Boulder 2024 flight deals

Discover exclusive flight deals for travel between San Francisco and Boulder in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,752,338 searches. Data last updated mayo 8, 2024.

These are some of the best deals we've found on flights to Boulder in 2024 at this time. If these deals don't appeal to you, be sure to come back soon for more options.

Non-stop flights to Boulder from San Francisco

For a quicker trip, book one of these direct flights from San Francisco to Boulder. Users seeking other options on flights from San Francisco to Boulder should update the search form at the top of the page.

San Francisco to Boulder flights leaving soon

Users seeking a last-minute flight from San Francisco to Boulder should consider booking one of these fares. Users should be sure to double check the price, date, and time of their last-minute flight.

One-way flights to Boulder from San Francisco

Take a look at some of the one-way flights we've detected from San Francisco to Boulder. Users can also find round-trip San Francisco to Boulder flights by using the search form above.

Find flights from San Francisco to Boulder within your budget

When is the best time to book a flight from San Francisco to Boulder?

Use this chart to determine the optimal time to book a round-trip flight from San Francisco to Boulder. Price data was last updated on May 3, 2024.

Booking 59 days in advance of your planned departure date is, on average, the best time to get cheap flights from San Francisco to Boulder. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

When is the cheapest time to fly from San Francisco to Boulder?

Use this chart to determine the cheapest time to fly round-trip from San Francisco to Boulder. Price data was last updated on May 5, 2024.

Average price of flights to Boulder by month

Plan your trip from San Francisco to Boulder by taking into account the cheapest months to travel. The average price of a one-way flight from San Francisco to Boulder is currently $54 while a round-trip flight costs $101. Price data was last updated on May 5, 2024.

Temperature and rainfall in Boulder by month

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

Reviews of airlines servicing Boulder

Related info for your journey

Find useful and relevant information for your journey from San Francisco to Boulder. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from San Francisco to Boulder?

Can I find flights from San Francisco to Boulder for under $100 on Cheapflights?

Are there nonstop flights from San Francisco to Boulder for under $100 on Cheapflights?

Are there last-minute flights available from San Francisco to Boulder for under $100?

What days are nonstop flights available from San Francisco to Boulder?

How popular is this San Francisco to Boulder flight route?

How many flights depart from San Francisco to Boulder on average per day?

How long is the flight from San Francisco to Boulder?

What are the cheapest airlines to fly from San Francisco to Boulder one-way?

What are the most popular airlines that fly from San Francisco to Boulder?

What are the most reliable airlines from San Francisco to Boulder?

What are the cheapest flights from San Francisco to Boulder?

What does SFO to DEN mean?

Can I find deals for flights from San Francisco to Boulder that include extra baggage allowance?

Can I find deals on flights from San Francisco to Boulder with specific airlines?

Can I find deals for flights from San Francisco to Boulder that include hotel bookings?

How can I find direct flights from San Francisco to Boulder?

Can I find deals for business class flights from San Francisco to Boulder?

Can I find deals for flights from San Francisco to Boulder that allow pets onboard?

Can I find deals on last-minute flights from San Francisco to Boulder?

How recently were the San Francisco to Boulder flight deals updated?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for San Francisco to BoulderSee prices for flight routes from nearby airports that may be better suited for you.

See prices for flight routes from nearby airports that may be better suited for you.

Top 6 airlines flying from San Francisco to Boulder

Popular flight searches

Check out other popular destinations found by fellow travelers in 2024

Search flights from San Francisco to Boulder by cabin class

Find flights from San Francisco to Boulder, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Hourly flight availability from San Francisco to Boulder

Find hourly flight availability from San Francisco to Boulder. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated mayo 8, 2024.

Weekly flight availability from San Francisco to Boulder

Explore weekly flight availability from San Francisco to Boulder. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated mayo 8, 2024.

Book a flight to one of these trending destinations

User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations

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 San Francisco to Boulder?

Why should you use Cheapflights to find cheap flight tickets from San Francisco to Boulder?

Alternative routes for San Francisco to Boulder
See prices for flight routes from nearby airports that may be better suited for you.