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

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How to find the cheapest flight from
Illinois to Washington

All the information you need to plan the best null to SEA flight in 2021: compare Illinois to Washington flight prices with the expected peak season, weather and rainfall in Washington.
When is the cheapest time to fly from Illinois to State of Washington (IL - WA)?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to State of Washington as you normally would.

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

To save up to 26% on this flight, we recommend booking at least 56 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Illinois to State of Washington from $215 1-2 weeks out and tickets from $233 for flights departing within the next 72 hours.

What is the cheapest month to fly from Illinois to State of Washington?

August can be a great time to fly to State of Washington from Illinois with a flight ticket averaging about $198. Cheapflights users have found deals in the month of August for as cheap as $86. The most expensive prices can be found in the month of December.

Cheap flights from Illinois to Washington in November, December 2021

The best prices found for Illinois to Washington flights for November, December
15 Dec - 6 Jan
$139pp
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
15 Dec - 16 Jan
$155pp
ORD
Chicago O'Hare Intl
Multiple Airlines
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Alaska Airlines
Non-Stop
ORD
Chicago O'Hare Intl
15 Dec - 7 Jan
$158pp
ORD
Chicago O'Hare Intl
Multiple Airlines
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Alaska Airlines
Non-Stop
ORD
Chicago O'Hare Intl

Illinois to Washington 2022 flight deals

Cheap flights to Washington from Illinois found for next year
15 Dec - 6 Jan
$139pp
ORD
Chicago O'Hare Intl
Frontier
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl
15 Dec - 16 Jan
$155pp
ORD
Chicago O'Hare Intl
Multiple Airlines
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Alaska Airlines
Non-Stop
ORD
Chicago O'Hare Intl
15 Dec - 7 Jan
$158pp
ORD
Chicago O'Hare Intl
Multiple Airlines
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Alaska Airlines
Non-Stop
ORD
Chicago O'Hare Intl

Non-stop flights to Washington from Illinois

Save time with Illinois to Washington direct flight deals
8 Feb - 8 Feb
$172pp
ORD
Chicago O'Hare Intl
Alaska Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Alaska Airlines
Non-Stop
ORD
Chicago O'Hare Intl
15 Jan - 19 Jan
$176pp
ORD
Chicago O'Hare Intl
Multiple Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Alaska Airlines
Non-Stop
ORD
Chicago O'Hare Intl
8 Jan - 18 Jan
$177pp
ORD
Chicago O'Hare Intl
Alaska Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Alaska Airlines
Non-Stop
ORD
Chicago O'Hare Intl

Last minute flights from Illinois to Washington

Late deals on round-trip flights to Washington from Illinois, departing today and this week
6 Dec - 13 Dec
$164pp
STL
Lambert-St Louis
Spirit Airlines
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis
6 Dec - 14 Dec
$174pp
STL
Lambert-St Louis
Spirit Airlines
 
1 STOP
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis
4 Dec - 10 Dec
$183pp
ORD
Chicago O'Hare Intl
Multiple Airlines
Non-Stop
SEA
Seattle/Tacoma Intl
SEA
Seattle/Tacoma Intl
Frontier
 
1 STOP
ORD
Chicago O'Hare Intl

One-way flights to Washington from Illinois

The cheapest one-way flights from Illinois to Washington
12:20 pm - 3:00 pm
Alaska Airlines
Nonstop
4h 40m
STL - SEA
Alaska Airlines
2:49 pm - 8:43 am
Spirit Airlines
1 Stop
19h 54m
STL - SEA
Spirit Airlines
$96
FareScan
12:25 pm - 4:01 am
Frontier
1 Stop
17h 36m
STL - SEA
Frontier
$99
Kiwi.com

Related info for your journey

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

Flight FAQs

From Illinois to Washington

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

Some of the carriers operating flights from Illinois to Washington that may be offering flexible cancellation policies are Alaska Airlines, Delta, and United Airlines. Our site will let you filter for all airlines offering greater flexibility due to COVID-19.

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

Yes, there are multiple flights from Illinois to State of Washington for under $200. The cheapest flight booked recently is on Frontier for just $128, but on average you can expect to pay $143.

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

Cheapflights has at least 20 direct flights from Illinois to State of Washington under $200. A good price for a nonstop flight from Illinois to State of Washington is less than $196.

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

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

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

Nonstop flights are available for this route on the following days: Sunday, Monday, Tuesday, Wednesday, Thursday, Saturday.

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

Travelers can expect 58 flights from Illinois to State of Washington on average per day.
Morning (6am - Noon) - 31% of flight departures
Afternoon (Noon - 6pm) - 34% of flight departures
Evening (6pm - Midnight) - 34% of flight departures

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

Airlines like Frontier fly from Illinois to State of Washington in about 13h 38m. The time it takes to get you to your destination can typically vary by up to . Illinois and State of Washington are separated by a distance of 1725 mi.

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

To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $60. Alaska Airlines flights start at $75 while deals on Spirit Airlines start at $77 one-way.

Related searches

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Rent a Car

Car Rentals in Washington

COVID Restrictions

View COVID Travel Restrictions for Washington (WA)

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

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

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

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.

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

Returning to Illinois from Washington

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.

Hide COVID Travel Restrictions for Washington (WA)

Destination points for flights from Illinois to Washington

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

Destination information for Washington

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

Airports servicing

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

Airports servicing

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

Top 6 airlines flying from Illinois to Washington

The chart below displays the airlines Cheapflights users traveling from Illinois to Washington 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
Alaska Airlines
$86 $327 No cancel fee 75%
Delta
$86 $391 No cancel fee N/A
Frontier
$87 $194 No cancel fee 62%
United Airlines
$90 $377 No cancel fee 69%
Spirit Airlines
$94 $203 No cancel fee 65%
American Airlines
$105 $461 No cancel fee 71%
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