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 - $296
Route
Depart
Return
Price
Seattle/Tacoma IntlChicago O'Hare Intl
SEA - ORD
SEAORD
Seattle/Tacoma Intl
Tue 9/17
Nonstop3h 59m
Chicago O'Hare Intl
Wed 9/25
Nonstop4h 35m
Seattle/Tacoma IntlChicago O'Hare Intl
SEA - ORD
SEAORD
Seattle/Tacoma Intl
Thu 9/5
1 stop9h 45m
Chicago O'Hare Intl
Tue 9/10
Nonstop4h 36m
Seattle/Tacoma IntlLambert-St Louis
SEA - STL
SEASTL
Seattle/Tacoma Intl
Fri 9/6
1 stop13h 14m
Lambert-St Louis
Wed 9/11
1 stop8h 51m
Seattle/Tacoma IntlChicago O'Hare Intl
SEA - ORD
SEAORD
Seattle/Tacoma Intl
Wed 7/10
1 stop7h 11m
Chicago O'Hare Intl
Tue 7/16
Nonstop4h 37m
Seattle/Tacoma IntlLambert-St Louis
SEA - STL
SEASTL
Seattle/Tacoma Intl
Mon 8/26
1 stop12h 27m
Lambert-St Louis
Tue 9/3
1 stop12h 05m
Seattle/Tacoma IntlChicago O'Hare Intl
SEA - ORD
SEAORD
Seattle/Tacoma Intl
Sat 9/21
Nonstop4h 10m
Chicago O'Hare Intl
Sat 9/21
1 stop7h 31m
Seattle/Tacoma IntlLambert-St Louis
SEA - STL
SEASTL
Seattle/Tacoma Intl
Wed 10/2
1 stop8h 59m
Lambert-St Louis
Sat 10/12
1 stop8h 37m
Seattle/Tacoma IntlChicago O'Hare Intl
SEA - ORD
SEAORD
Seattle/Tacoma Intl
Thu 11/14
Nonstop3h 54m
Chicago O'Hare Intl
Fri 11/15
Nonstop4h 37m
Seattle/Tacoma IntlChicago Midway
SEA - MDW
SEAMDW
Seattle/Tacoma Intl
Wed 7/10
Nonstop4h 05m
Chicago Midway
Thu 7/11
1 stop10h 30m
No data available for this route at this time. Please check back soon.
Overall
Comfort
Entertainment
Boarding
Crew
Food
Reviews
Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.
Overall
Comfort
Entertainment
Boarding
Crew
Food
Reviews
Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.
Overall
Comfort
Entertainment
Boarding
Crew
Food
Reviews
Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.
Overall
Comfort
Entertainment
Boarding
Crew
Food
Reviews
Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.
Overall
Comfort
Entertainment
Boarding
Crew
Food
Reviews
Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.
Overall
Comfort
Entertainment
Boarding
Crew
Food
Reviews
Wish the there were an electrical outlet to plug the phone. it died within 10 minutes of being in the air.
Airline | Cheapest | Average | Flexibility | On-time |
---|---|---|---|---|
Delta | Cheapest$84 | Average$434 | FlexibilityNo cancel fee | On-timeN/A |
Alaska Airlines | Cheapest$99 | Average$482 | FlexibilityNo cancel fee | On-time75% |
American Airlines | Cheapest$108 | Average$524 | FlexibilityNo cancel fee | On-time71% |
Frontier | Cheapest$121 | Average$204 | FlexibilityNo cancel fee | On-time62% |
United Airlines | Cheapest$126 | Average$552 | FlexibilityNo cancel fee | On-time69% |
Spirit Airlines | Cheapest$129 | Average$302 | FlexibilityNo cancel fee | On-time65% |
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 |