Users have found that booking a flight from Seattle to Illinois at least 42 days early can save you up to 99% on average compared to booking a flight this week. If booking 42 days before your flight isn’t an option for you, users have found flights from Seattle to Illinois for as little as $328 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $591 for flights departing within the next 3 days.
Flights from Seattle to Illinois lean towards being more expensive in July. Prices are generally better when you fly from Seattle to Illinois in February, with the cheapest ticket starting at $69.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Illinois as you normally would.
Fly from
Fly to
Budget
$122 - $270
Route
Depart
Return
Price
Seattle/Tacoma IntlLambert-St Louis
SEA - STL
SEASTL
Seattle/Tacoma Intl
Tue 6/4
1 stop13h 25m
Lambert-St Louis
Mon 6/10
1 stop20h 18m
Seattle/Tacoma IntlChicago O'Hare Intl
SEA - ORD
SEAORD
Seattle/Tacoma Intl
Tue 6/4
1 stop6h 56m
Chicago O'Hare Intl
Tue 6/11
1 stop12h 31m
Seattle/Tacoma IntlChicago O'Hare Intl
SEA - ORD
SEAORD
Seattle/Tacoma Intl
Tue 6/4
1 stop6h 56m
Chicago O'Hare Intl
Tue 6/11
Nonstop4h 27m
Seattle/Tacoma IntlChicago O'Hare Intl
SEA - ORD
SEAORD
Seattle/Tacoma Intl
Tue 5/21
1 stop26h 59m
Chicago O'Hare Intl
Sat 5/25
1 stop15h 08m
Seattle/Tacoma IntlChicago O'Hare Intl
SEA - ORD
SEAORD
Seattle/Tacoma Intl
Tue 6/4
Nonstop4h 15m
Chicago O'Hare Intl
Tue 6/11
Nonstop4h 27m
Seattle/Tacoma IntlChicago O'Hare Intl
SEA - ORD
SEAORD
Seattle/Tacoma Intl
Wed 6/5
Nonstop4h 06m
Chicago O'Hare Intl
Tue 6/11
Nonstop4h 44m
Seattle/Tacoma IntlLambert-St Louis
SEA - STL
SEASTL
Seattle/Tacoma Intl
Tue 10/1
1 stop8h 05m
Lambert-St Louis
Tue 10/8
1 stop10h 12m
Seattle/Tacoma IntlChicago O'Hare Intl
SEA - ORD
SEAORD
Seattle/Tacoma Intl
Wed 6/12
Nonstop4h 00m
Chicago O'Hare Intl
Fri 6/14
Nonstop4h 38m
Seattle/Tacoma IntlChicago O'Hare Intl
SEA - ORD
SEAORD
Seattle/Tacoma Intl
Thu 6/20
1 stop9h 39m
Chicago O'Hare Intl
Mon 6/24
1 stop16h 57m
No data available for this route at this time. Please check back soon.
Boarding
Overall
Crew
Food
Comfort
Entertainment
Reviews
The seats are too narrow and uncomfortable. I do appreciate that there was room for my knees. I hate the boarding circus.
Boarding
Overall
Crew
Food
Comfort
Entertainment
Reviews
The seats are too narrow and uncomfortable. I do appreciate that there was room for my knees. I hate the boarding circus.
Boarding
Overall
Crew
Food
Comfort
Entertainment
Reviews
The seats are too narrow and uncomfortable. I do appreciate that there was room for my knees. I hate the boarding circus.
Boarding
Overall
Crew
Food
Comfort
Entertainment
Reviews
The seats are too narrow and uncomfortable. I do appreciate that there was room for my knees. I hate the boarding circus.
Boarding
Overall
Crew
Food
Comfort
Entertainment
Reviews
The seats are too narrow and uncomfortable. I do appreciate that there was room for my knees. I hate the boarding circus.
Boarding
Overall
Crew
Food
Comfort
Entertainment
Reviews
The seats are too narrow and uncomfortable. I do appreciate that there was room for my knees. I hate the boarding circus.
23%of flight departures | Early morningMidnight to 6 am |
---|---|
42%of flight departures | Morning6 am to noon |
23%of flight departures | AfternoonNoon to 6 pm |
12%of flight departures | Evening6 pm to midnight |
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