HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Washington

$88+ Cheap flights from Illinois to Washington

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/14. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SEA
Apr 7 — Apr 141
Mon 4/7
Mon 4/14
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Illinois to Washington with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Illinois to Washington

Keep the following information in mind while searching for Illinois to Washington flight deals. Data was last updated April 2, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$169
(Hawaiian Airlines)

One-way from

$88
(American Airlines)

Popular in

July

Cheapest in

February

Average price

$231

Good round-trip deal

$257 or less

Good one-way deal

$127 or less
Provider with most accurate pricing for Chicago (CHI)-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Seattle/Tacoma Intl flights.
Search Deals
From Illinois to Washington
Search Deals
One-way flight from Illinois to Washington
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($62 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals
Price to beat on a round-trip flight from Illinois to Washington.
Search Deals
Price to beat on a one-way flight from Illinois to Washington.
Search Deals

Find flight deals from Illinois to Washington

Cheapest flights from Illinois to Washington
Explore the most affordable flight options available from Illinois to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 2, 2025.

This Delta deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/312:48 pmORD - SEA
Nonstop4h 37mDelta
Sat 9/135:45 pmSEA - ORD
Nonstop4h 02mDelta
Deal found 4/1$169
This Alaska Airlines deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/316:24 amORD - SEA
Nonstop4h 36mAlaska Airlines
Wed 9/311:36 pmSEA - ORD
Nonstop4h 04mAlaska Airlines
Deal found 4/1$174
This United Airlines deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/37:00 amORD - SEA
1 stop9h 00mUnited Airlines
Tue 5/62:15 pmSEA - ORD
Nonstop4h 10mUnited Airlines
Deal found 4/1$175
This Mytrip deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/295:36 amORD - SEA
2 stops31h 59mSpirit Airlines
Tue 5/612:30 pmSEA - ORD
1 stop20h 25mSpirit Airlines
Deal found 4/1$183
This Southwest deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/61:35 pmMDW - SEA
1 stop9h 25mSouthwest
Tue 9/166:15 amSEA - MDW
1 stop7h 50mSouthwest
Deal found 4/1$188
This Trip.com deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/266:00 amORD - SEA
Nonstop4h 30mHawaiian Airlines
Sat 5/37:00 amSEA - ORD
1 stop10h 10mHawaiian Airlines
Deal found 4/1$190
This Expedia deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/1412:00 pmORD - SEA
Nonstop4h 33mMultiple Airlines
Sun 5/183:20 pmSEA - ORD
1 stop12h 05mMultiple Airlines
Deal found 3/31$194
This Delta deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/305:00 pmSTL - SEA
1 stop9h 02mDelta
Fri 5/212:45 amSEA - STL
1 stop7h 56mDelta
Deal found 3/31$197
This Delta deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/256:00 pmORD - GEG
1 stop6h 47mDelta
Tue 9/305:05 amGEG - ORD
1 stop6h 23mDelta
Deal found 4/2$197
This American Airlines deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/2110:55 amORD - GEG
Nonstop4h 16mAmerican Airlines
Sat 6/281:51 pmGEG - ORD
Nonstop3h 44mAmerican Airlines
Deal found 3/31$205
This Trip.com deal was found by Cheapflights users on 4/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/177:00 amORD - GEG
1 stop6h 32mMultiple Airlines
Sat 5/243:35 pmGEG - ORD
1 stop6h 21mMultiple Airlines
Deal found 4/2$207
This American Airlines deal was found by Cheapflights users on 4/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/187:23 amSTL - SEA
1 stop9h 00mAmerican Airlines
Sat 9/271:29 pmSEA - STL
1 stop8h 20mAmerican Airlines
Deal found 4/1$214

Cheapflights Fare Finder

Customize your flight search to find flights from Illinois to Washington that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 2, 2025.
Use the filters below to find and compare flights from Illinois to Washington that are best for you.

Fly from

Illinois

Fly to

Washington

Route

Depart

Return

Price

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 5/3

2:15 pm-4:57 pm

Nonstop4h 42m

Seattle/Tacoma Intl

Sat 5/10

5:50 pm-11:59 pm

Nonstop4h 09m

$169

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 5/3

7:00 am-2:00 pm

1 stop9h 00m

Seattle/Tacoma Intl

Sat 5/10

5:18 pm-11:23 pm

Nonstop4h 05m

$175

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 5/7

6:00 am-8:30 am

Nonstop4h 30m

Seattle/Tacoma Intl

Sat 5/17

10:00 am-11:56 pm

1 stop11h 56m

$179

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Tue 4/29

5:36 am-11:35 am

2 stops31h 59m

Seattle/Tacoma Intl

Tue 5/6

12:30 pm-10:55 am

1 stop20h 25m

$183

ChicagoSeattle

MDW - SEA

MDWSEA

Chicago Midway

Sat 9/6

1:35 pm-9:00 pm

1 stop9h 25m

Seattle/Tacoma Intl

Tue 9/16

6:15 am-4:05 pm

1 stop7h 50m

$188

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 4/26

6:00 am-8:30 am

Nonstop4h 30m

Seattle/Tacoma Intl

Sat 5/3

7:00 am-7:10 pm

1 stop10h 10m

$190

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Fri 5/9

3:44 pm-6:21 pm

Nonstop4h 37m

Seattle/Tacoma Intl

Tue 5/13

3:20 pm-5:25 am

1 stop12h 05m

$197

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Wed 4/30

5:00 pm-12:02 am

1 stop9h 02m

Seattle/Tacoma Intl

Fri 5/2

12:45 am-10:41 am

1 stop7h 56m

$197

ChicagoSpokane

ORD - GEG

ORDGEG

Chicago O'Hare Intl

Thu 9/25

6:00 pm-10:47 pm

1 stop6h 47m

Spokane

Tue 9/30

5:05 am-1:28 pm

1 stop6h 23m

$197

ChicagoSpokane

ORD - GEG

ORDGEG

Chicago O'Hare Intl

Sat 6/21

10:55 am-1:11 pm

Nonstop4h 16m

Spokane

Sat 6/28

1:51 pm-7:35 pm

Nonstop3h 44m

$205

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/1

Showing 1-10 of 60 results
1
2
3
...
6

Best time to book a flight from Illinois to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington from Illinois with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Washington

What is the cheapest month to book a flight from Illinois to State of Washington?

Currently, January is the cheapest month in which you can book a flight from Illinois to State of Washington (average of $238). Flying from Illinois to State of Washington in July is currently the most expensive (average of $411). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IL to WA?

Find hourly flight availability from Illinois to Washington. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 2, 2025.

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.

Weekly flight availability from Illinois to State of Washington

Explore weekly flight availability from Illinois to Washington. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated April 2, 2025.

The most flights from USIL to USWA are scheduled on a Tuesday (49 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (14 on average).

Rainfall in Washington by month

Plan your trip to Washington by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in State of Washington ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit State of Washington when rainfall is around 0.7 in.

Temperature in Washington by month

Plan your trip to Washington by taking into account the average temperature totals by month.

If weather is an important factor for your trip to State of Washington, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Washington

Get insights into the airlines that provide service to Washington. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Washington. Reviews last updated April 2, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest and Delta from Illinois to Washington to help guide your decision. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,823 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,823 reviews
Alaska Airlines
8.0
Very good
9,823 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very good
4,275 reviews
Alaska Airlines
8.0
Very good
9,823 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,899 reviews
Alaska Airlines
8.0
Very good
9,823 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Hawaiian Airlines
7.9
Good
2,345 reviews
Alaska Airlines
8.0
Very good
9,823 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,615 reviews
Alaska Airlines
8.0
Very good
9,823 reviews

Boarding

8.2

Overall

8.0

Comfort

7.9

Food

7.1

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

Find useful and relevant information for your journey from Illinois to Washington. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

    To fly one-way, consider booking your trip with American Airlines, which is currently one of the cheapest options available, starting at $88. Hawaiian Airlines flights start at $89 while deals on Alaska Airlines start at $90 one-way.

  • Can I find deals for flights from Illinois to Washington that include hotel bookings?

    Yes. In addition to deals on Illinois to Washington flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Washington?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Washington.

  • Can I find deals for business class flights from Illinois to Washington?

    Yes. Cheapflights offers flight deals from Illinois to Washington by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Illinois to State of Washington?

    Currently, January is the cheapest month in which you can book a flight from Illinois to State of Washington (average of $238). Flying from Illinois to State of Washington in July is currently the most expensive (average of $411). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Illinois to Washington

See prices for flight routes from nearby airports that may be better suited for you.
Newark to Fort Lauderdale flights
John F Kennedy Intl to Miami flights
LaGuardia to Miami flights
LaGuardia to Fort Lauderdale flights
Newark to Miami flights
John F Kennedy Intl to Los Angeles flights
Newark to Orlando flights
Los Angeles to John F Kennedy Intl flights
LaGuardia to Orlando flights
LaGuardia to Dallas/Fort Worth flights
John F Kennedy Intl to Las Vegas flights
Dallas/Fort Worth to Seattle flights
John F Kennedy Intl to Fort Lauderdale flights
Newark to Las Vegas flights
John F Kennedy Intl to Orlando flights
Dallas/Fort Worth to LaGuardia flights
San Francisco to John F Kennedy Intl flights
LaGuardia to O'Hare Intl flights
Dallas/Fort Worth to O'Hare Intl flights
John F Kennedy Intl to Seattle flights
Newark to Seattle flights
LaGuardia to Atlanta flights
Newark to Dallas/Fort Worth flights
John F Kennedy Intl to West Palm Beach flights
Dallas/Fort Worth to Las Vegas flights
Los Angeles to Honolulu flights
Newark to Los Angeles flights
Los Angeles to Newark flights
Newark to Tampa flights
O'Hare Intl to John F Kennedy Intl flights
LaGuardia to Los Angeles flights
Dallas/Fort Worth to Newark flights
O'Hare Intl to LaGuardia flights
O'Hare Intl to Las Vegas flights
Seattle to Las Vegas flights
John F Kennedy Intl to Dallas/Fort Worth flights
John F Kennedy Intl to Sky Harbor Intl flights
John F Kennedy Intl to Denver flights
San Francisco to Newark flights
LaGuardia to Las Vegas flights
Atlanta to LaGuardia flights
Los Angeles to Seattle flights
Los Angeles to LaGuardia flights
John F Kennedy Intl to San Francisco flights
Seattle to Los Angeles flights
Dallas/Fort Worth to Orlando flights
Denver to Las Vegas flights
Newark to New Orleans flights
O'Hare Intl to Dallas/Fort Worth flights
John F Kennedy Intl to O'Hare Intl flights

Top 8 airlines flying from Illinois to Washington

Discover the top 8 airlines that operate flights from Illinois to Washington. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$89Average$264FlexibilityNo cancel feeOn-time85%
FrontierCheapest$118Average$226FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$121Average$240FlexibilityNo cancel feeOn-time65%
Alaska AirlinesCheapest$139Average$494FlexibilityNo cancel feeOn-time75%
DeltaCheapest$140Average$391FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$151Average$514FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$168Average$503FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$197Average$466FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.