Users have found that booking a flight from Seattle to Illinois at least 27 days early can save you up to 89% on average compared to booking a flight this week. If booking 27 days before your flight isn’t an option for you, users have found flights from Seattle to Illinois for as little as $338 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 $598 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
$149 - $213
Route
Depart
Return
Price
Seattle/Tacoma IntlChicago O'Hare Intl
SEA - ORD
SEAORD
Seattle/Tacoma Intl
Tue 10/29
Nonstop3h 53m
Chicago O'Hare Intl
Sat 11/2
Nonstop4h 41m
Seattle/Tacoma IntlLambert-St Louis
SEA - STL
SEASTL
Seattle/Tacoma Intl
Wed 9/4
1 stop25h 53m
Lambert-St Louis
Mon 9/9
1 stop19h 43m
Seattle/Tacoma IntlChicago O'Hare Intl
SEA - ORD
SEAORD
Seattle/Tacoma Intl
Tue 9/10
1 stop9h 45m
Chicago O'Hare Intl
Sat 9/14
Nonstop4h 33m
Seattle/Tacoma IntlLambert-St Louis
SEA - STL
SEASTL
Seattle/Tacoma Intl
Wed 9/4
2 stops22h 28m
Lambert-St Louis
Mon 9/9
1 stop19h 43m
Seattle/Tacoma IntlChicago O'Hare Intl
SEA - ORD
SEAORD
Seattle/Tacoma Intl
Wed 7/24
1 stop10h 39m
Chicago O'Hare Intl
Tue 7/30
Nonstop4h 37m
Seattle/Tacoma IntlChicago Midway
SEA - MDW
SEAMDW
Seattle/Tacoma Intl
Sat 8/17
1 stop10h 37m
Chicago Midway
Sat 8/24
1 stop11h 33m
Seattle/Tacoma IntlChicago O'Hare Intl
SEA - ORD
SEAORD
Seattle/Tacoma Intl
Wed 8/14
Nonstop4h 09m
Chicago O'Hare Intl
Mon 8/19
Nonstop4h 46m
Seattle/Tacoma IntlChicago O'Hare Intl
SEA - ORD
SEAORD
Seattle/Tacoma Intl
Thu 7/25
1 stop15h 20m
Chicago O'Hare Intl
Mon 7/29
1 stop15h 17m
Seattle/Tacoma IntlChicago O'Hare Intl
SEA - ORD
SEAORD
Seattle/Tacoma Intl
Sat 8/17
Nonstop3h 56m
Chicago O'Hare Intl
Tue 8/20
Nonstop4h 40m
No data available for this route at this time. Please check back soon.
Comfort
Crew
Entertainment
Boarding
Overall
Food
Reviews
Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.
Comfort
Crew
Entertainment
Boarding
Overall
Food
Reviews
Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.
Comfort
Crew
Entertainment
Boarding
Overall
Food
Reviews
Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.
Comfort
Crew
Entertainment
Boarding
Overall
Food
Reviews
Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.
Comfort
Crew
Entertainment
Boarding
Overall
Food
Reviews
Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.
Comfort
Crew
Entertainment
Boarding
Overall
Food
Reviews
Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.
1%of flight departures | Early morningMidnight to 6 am |
---|---|
47%of flight departures | Morning6 am to noon |
39%of flight departures | AfternoonNoon to 6 pm |
13%of flight departures | Evening6 pm to midnight |
Cheapflights helps you search for flights from Seattle to Illinois via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.
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Yes, we can. To see specific flights from Seattle to Illinois with no change fees, users can toggle flexible booking options after using the search form above to find flights.
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