Cheap flights from Washington (WA) to Illinois (IL)

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How to find the cheapest flight from
Washington to Illinois

All the information you need to plan the best null to ORD flight in 2021: compare Washington to Illinois flight prices with the expected peak season, weather and rainfall in Illinois.
What is the cheapest month to fly from State of Washington to Illinois?

August can be a great time to fly to Illinois from State of Washington with a flight ticket averaging about $214. Cheapflights users have found deals in the month of August for as cheap as $78. The most expensive prices can be found in the month of December.

When is the cheapest time to fly from State of Washington to Illinois (WA - IL)?

When flying from State of Washington to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How far in advance should I book a flight from State of Washington to Illinois?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 57 days in advance, which can save you up to 13% on flights from State of Washington to Illinois compared to booking the week you need them. Waiting 57 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $226. For sooner than that we have options available in the next 3 days from $247.

Cheap flights from Washington to Illinois in November, December 2021

The best prices found for Washington to Illinois flights for November, December
3 Dec - 15 Dec
$125pp
SEA
Seattle/Tacoma Intl
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
SEA
Seattle/Tacoma Intl
13 Dec - 16 Dec
$137pp
SEA
Seattle/Tacoma Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
SEA
Seattle/Tacoma Intl
12 Dec - 15 Dec
$139pp
SEA
Seattle/Tacoma Intl
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
SEA
Seattle/Tacoma Intl

Washington to Illinois 2022 flight deals

Cheap flights to Illinois from Washington found for next year
3 Dec - 15 Dec
$125pp
SEA
Seattle/Tacoma Intl
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
SEA
Seattle/Tacoma Intl
13 Dec - 16 Dec
$137pp
SEA
Seattle/Tacoma Intl
Frontier
 
1 STOP
STL
Lambert-St Louis
STL
Lambert-St Louis
Frontier
 
1 STOP
SEA
Seattle/Tacoma Intl
12 Dec - 15 Dec
$139pp
SEA
Seattle/Tacoma Intl
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
SEA
Seattle/Tacoma Intl

Non-stop flights to Illinois from Washington

Save time with Washington to Illinois direct flight deals
5 Feb - 13 Feb
$187pp
SEA
Seattle/Tacoma Intl
Alaska Airlines
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Alaska Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
14 Jan - 17 Jan
$192pp
SEA
Seattle/Tacoma Intl
Major Airline
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Major Airline
Non-Stop
SEA
Seattle/Tacoma Intl
15 Jan - 18 Jan
$196pp
SEA
Seattle/Tacoma Intl
Multiple Airlines
Non-Stop
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Delta
Non-Stop
SEA
Seattle/Tacoma Intl

Last minute flights from Washington to Illinois

Late deals on round-trip flights to Illinois from Washington, departing today and this week
3 Dec - 15 Dec
$125pp
SEA
Seattle/Tacoma Intl
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
SEA
Seattle/Tacoma Intl
3 Dec - 16 Dec
$156pp
SEA
Seattle/Tacoma Intl
Multiple Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Alaska Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
3 Dec - 10 Dec
$166pp
SEA
Seattle/Tacoma Intl
Multiple Airlines
 
1 STOP
ORD
Chicago O'Hare Intl
ORD
Chicago O'Hare Intl
Alaska Airlines
Non-Stop
SEA
Seattle/Tacoma Intl

One-way flights to Illinois from Washington

The cheapest one-way flights from Washington to Illinois
9:34 am - 1:04 am
Spirit Airlines
1 Stop
13h 30m
SEA - ORD
Spirit Airlines
$83
FareScan
1:08 pm - 6:59 pm
Alaska Airlines
Nonstop
3h 51m
SEA - ORD
Alaska Airlines
$86
TravelGo
12:30 am - 6:39 am
Major Airline
Nonstop
4h 09m
SEA - ORD
Major Airline
$88
StudentUniverse

Related info for your journey

Useful info, stats and facts about <span class="emphasized">Washington</span> to <span class="emphasized">Illinois</span> flights.

Flight FAQs

From Washington to Illinois

Which airlines flying from Washington to Illinois have flexible cancellations due to COVID-19?

Some of our airline partners flying from Washington to Illinois have new flexible policies in place due to COVID-19. Alaska Airlines, Delta, and United Airlines are some of the carriers where you may find flexible cancellation policies. You can use our site to filter for airlines like Alaska Airlines with this kind of flexibility.

Can I find flights from State of Washington to Illinois for under $200 on Cheapflights?

Yes, there are multiple flights from State of Washington to Illinois for under $200. The cheapest flight booked recently is on Frontier for just $130, but on average you can expect to pay $147.

Are there nonstop flights from State of Washington to Illinois for under $200 on Cheapflights?

Cheapflights has at least 20 direct flights from State of Washington to Illinois under $200. A good price for a nonstop flight from State of Washington to Illinois is less than $211.

Are there last-minute flights available from State of Washington to Illinois for under $200?

There are currently 20+ open flights from State of Washington to Illinois within the next 7 days for less than $200.

What days are nonstop flights available from State of Washington to Illinois?

You can find nonstop flights on the following days: Sunday, Monday, Wednesday, Thursday, Friday, Saturday.

How many flights depart from State of Washington to Illinois on average per day?

Travelers can expect 39 flights from State of Washington to Illinois on average per day.
Early Morning (Midnight to 6am) - 10% of flight departures
Morning (6am - Noon) - 67% of flight departures
Evening (6pm - Midnight) - 23% of flight departures

How long is the flight from State of Washington to Illinois?

For as low as $130, Frontier can have you in Illinois from State of Washington in 6h 41m. The distance between State of Washington and Illinois is about 1725 mi.

What are the cheapest airlines to fly from State of Washington to Illinois one-way?

One-way options have recently been found by users for as low as $58 on Frontier. Other airlines that offer cheap prices include Spirit Airlines from $76 and Alaska Airlines from $81 one-way.

COVID Restrictions

View COVID Travel Restrictions for Illinois (IL)

Do I need a COVID test to fly to Illinois from Washington?

Information is based on travel restrictions for travel to Illinois within the United States

Most visitors from Washington need to provide a negative COVID-19 test result and/or quarantine to enter Illinois.

COVID-19 testing requirements
Visitors from Washington must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Illinois.

Quarantine requirements
Visitors from Washington are not required to quarantine after entering Illinois.

Do I need a test to fly back to Washington from Illinois?

Returning to Washington from Illinois

COVID-19 testing requirements
Visitors from Illinois must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Washington.

Quarantine requirements
Visitors from Illinois are not required to quarantine after entering Washington.

Hide COVID Travel Restrictions for Illinois (IL)

Destination points for flights from Washington to Illinois

Select to see more specific information for flights from Washington to all places in Illinois.

Destination information for Illinois

Things to know before you go - useful duration and weather info for your trip from Washington to Illinois.
Flight duration from Washington to Illinois
4h 15m

Airports servicing

Seattle King County/Boeing (BFI)
Bellingham (BLI)
Deer Harbor (DHB)
Wenatchee (EAT)
Eastsound Orcas Island (ESD)
Friday Harbor SPB (FBS)

Airports servicing

Bloomington (BMI)
Champaign (CMI)
Decatur (DEC)
Moline (MLI)
Marion (MWA)

Top 7 airlines flying from Washington to Illinois

The chart below displays the airlines Cheapflights users traveling from Washington to Illinois choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
Spirit Airlines
$84 $211 No cancel fee 65%
Delta
$86 $418 No cancel fee N/A
United Airlines
$95 $413 No cancel fee 69%
American Airlines
$103 $408 No cancel fee 71%
Frontier
$108 $256 No cancel fee 62%
Alaska Airlines
$110 $363 No cancel fee 75%
Southwest
$355 $610 No cancel fee 63%
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