$61 Find Cheap Flights from Illinois to Washington

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Low seasonFebruary
High seasonJuly
Cheapest flight$61
Best time to beat the crowds with an average 8% drop in price.
Most popular time to fly with an average 10% increase in price.
Flight from Chicago O'Hare Airport to Seattle

Flights from Illinois to Washington: the best tips from KAYAK users

Insights shared by verified travelers who flew the route from Illinois to Washington 
Verified travelerFlew with Alaska AirlinesORD-SEAJun 2024
It was my first time flying with Alaska and I was delayed 3.5 hours. Might reconsider using Alaska in the future.
PaulFlew with Alaska AirlinesORD-SEAApr 2024
The flight is long, at over four hours. I would try to get a window or aisle seat to be more comfortable. I would check with other airlines that allow you to choose your seat even if you are in the economy section. I would bring your own food on the plane as the service was sometimes sketchy.
Verified travelerFlew with Alaska AirlinesORD-SEAApr 2024
If you miss your flight ask any alaska agent to how and where to rebook the flight.
SeanFlew with Alaska AirlinesORD-SEAJan 2024
Signage for hotel shuttles at O’Hare is poor. Restrooms were surprisingly clean. In winter especially, there are going to be delays.

FAQs for booking flights from Illinois to Washington

  • How does KAYAK find such low prices on flights from Illinois to Washington?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Washington.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Washington?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Illinois to Washington is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Illinois to Washington?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from Illinois to Washington with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Washington?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from Illinois to Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which is the cheapest airport to fly into in Washington?

    Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in Washington is Spokane Airport (GEG), with an average flight price of $159.

  • What is the cheapest day to fly to Washington?

    Based on KAYAK data, the cheapest day to fly to Washington is Thursday where round-trip tickets can be as cheap as $351. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $445 on average.

  • What is the cheapest time of day to fly to Washington?

    The cheapest time of day to fly to Washington is generally at night, when round-trip flights cost $317 on average. Morning departures are around 12% more expensive than evening flights, on average. The most expensive time of day to fly to Washington is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $393.

  • What is the cheapest flight to Washington?

    The cheapest ticket to Washington from Illinois found in the last 72 hours was to Seattle, at $169 round-trip. The most popular route is Chicago Midway Airport (MDW) to Seattle (SEA) and the cheapest round-trip airline ticket found on this route in the last 72 hours was $169.

  • What is the cheapest month to fly from Illinois to Washington?

    The cheapest month for flights from Illinois to Washington is August, when tickets cost $294 (return) on average. On the other hand, the most expensive months are January and February, when the average cost of round-trip tickets is $622 and $610 respectively.

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

    To get a below average price on the flight from Illinois to Washington, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 8 weeks before departure.

  • How long is the flight to Washington?

    An average nonstop flight from Illinois to Washington takes 9h 05m, covering a distance of 1627 miles. The shortest route is Chicago Midway Airport (MDW) to Spokane (GEG) with an average flight time of 3h 55m.

  • What are the most popular destinations in Washington?

    Based on KAYAK flight searches, the most popular destination is Seattle (74% of total searches to Washington). The next most popular destinations are Portland (22%) and Spokane (3%). Searches for flights to Pasco (0%), to Pullman (0%) and to Walla Walla (0%) are also popular.

Top 5 airlines serving from Illinois to Washington

Need help choosing which airline to fly with from Illinois to Washington? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Alaska AirlinesOverall score based on 9968 reviews
7.9Comfort
8.2Boarding
7.1Entertainment
8.5Crew
7.1Food
Airline reviews

Booked a premium seats weeks ago and got an email the night before that id instead be seated in the cabin. Only reason I booked this overnight flight was for the better seating. All they are doing to compensate is giving a $29 coupon to use on another flight. I won’t be booking this airline again.

4.0 OkayAnonymous, Apr 2025EWR - SEA
Read more Alaska Airlines reviews

Booked a premium seats weeks ago and got an email the night before that id instead be seated in the cabin. Only reason I booked this overnight flight was for the better seating. All they are doing to compensate is giving a $29 coupon to use on another flight. I won’t be booking this airline again.

It was all great all around. Will travel with Alaska next trip.

There was no seating at the gate, no where to charge your devices, super crowded. Boarding in group F meant all luggage space was taken when it was time for me to board. The boarding crew was short with everyone and seemed irritated. The luggage space was insufficient, the seat was too small for me (6'4") and very uncomfortable trip. I was in a middle seat between a person snoring the whole trip and a person with very strong body odor. The flight crew was terse and unfriendly, seemed irritated and impatient. Yelled a lot at people with earbuds in, understandable. Finally, we arrived 10 minutes early, only to sit on the tarmac for 20 minutes and wait for a gate. Worst flight experience I've had in years.

Flight 351 SEA to BOI was terrible. We got to cruising altitude and I needed to use the restroom but the fasten seatbelt sign never came off. There was no turbulence and I'd felt the plane level off so I stood up to use the restroom about 15 minutes after we leveled off. The stewardess went over the intercom and said I needed to be seated because the captain hadn't turned off the fasten seatbelt sign....Which... Fair.... But not five minutes later she went and used the bathroom. Felt very unprofessional to leave a paying customer with a burning urethra for the entire flight and bark at them to sit down and still use the bathroom yourself. They never did turn off the seatbelt sign.

For longer trips, snacks are puny, boring and don’t have ANY nutritional value.

Upgraded to first class both times .The flight attendant Spicy Tim.was excellent and very amusing.

Close boarding too early we’re willing to not let people on flight that could not check in. What ever happened to customer service? Three of us had to fight to get on plane shameful

Check your emails that you sent me. 9 emails were sent telling me that my flight is Delayed. Each one with a different time 7:10, 7:55, 9:31, 9:09, 9:29, 9:44, 10:00, 9:49, and 10:10. That was how my experience went.

Made us check our carry on,even though there was plenty of room because they didn't check with the flight crew. Also boarding was 40min late, due to the plane being on the wrong side of the airport. Also their app didn't record my tsa precheck

The flight was delayed due to a safety check. Why couldn't that have been done ahead of time? We got to Seattle with enough time to make our connecting flight but they kept changing the gate so we missed it. There were at least ten of us who missed the flight. The airline was aware. They could have waited. They didn't. Our new flight was not for seven hours and then was delayed another two hours. We got the last seats which don't recline. Super uncomfortable after a long day spent at the worst airport. Did they offer us a meal voucher or anything? On top of that Alaska Airlines didn't complete my ticket to the new flight. I wasn't sure I would get on this horrible flight, either. Oh, and it's ten o'clock at night....no food. Is this how Alaska Airlines treats its customers? I'll never fly with this airline again.

It is southwest seat was ok. Not the most comfortable seat

I’ve always loved Southwest. No issues at all. I was flying standby and the gate agent was extremely friendly and helpful. Boarding was smooth and I was able to get a window seat in the emergency exit row. Crew was fantastic! They were very professional and accommodating. We had to divert from our destination due to weather but the flight crew kept everyone at ease and informed us of all pertinent information. Excellent flight

The price of the tickets isn't matching the flight experience. No matter how long the flight is, you're only getting pretzels. The flight attendants looked unkept and over it.

Plz don't take away free bags and free seating

The seats were a bit cramped and worn, but otherwise okay.

I would have liked to arrive on time - not 5 hours late!

After a 3 hour layover in Denver my flight was delayed over 5 hours! No explanation; no assistance; no offer to provide compensation; no one at Southwest was willing to offer any assistance. 8 hours in the Denver airport - ridiculous!

It was a perfect flight in all aspects! Both legs!

Only one drink pass through the cabin for a 4 hour flight. Quite rough and bumpy landing.

Boarding process, crew were good. But the seats were so uncomfortable that was all I could focus on. I literally had to sit forward so that all 3 of us could fit in row. I will try to avoid Southwest in the future for any flights over 60 minutes.

Delta is my preferred airline. I've traveled with them for years. On time in most cases, good communication, easy to use app. Most planes are pretty nice. I was on a CRJ 700/900 however, which was pretty badly aged inside and needed a refresh. No infotainment, unreliable wifi, best to download before boarding or bring a book. Food choices are really just snacks on this flight, nice variety but about what you'd expect. Great staff and prompt in departure and early arrival too. Overall quite satisfied.

Crew was friendly Love the entertainment in the seat head rest.

Delta flight was on time, seats were comfortable, and crew was nice.

This had nothing to do with Delta… The flights were on time and flawless. The service was excellent. We purchased seats in (aisle/middle) comfort plus since this was a cross country flight. Unfortunately, the woman seated at the window was 300+ pounds and, as might be expected, covered up about a third of the middle seat also. there was absolutely nothing that Delta could have done about that… I just don’t know what the answer should be. If you purchase a seat, you should should be able to use the entire seat and not just the portion that someone else is not sitting/oozing in. Disappointing…there should be something that could be done….I'm just not sure what solution could be.

Delayed take-off. Very small plane so very scary with lots of bumps during the flight. Would never fly Delta on short flights in small 80 seaters plane again! Felt relieved when landed.

The worst part was I was NOT allowed in the lounge even though I was holding a first class ticket and have a premium American Express card. I have flown Business or First Class with many airlines. Delta is the ONLY one who does not extend this courtesy to anyone except people who hold the very expensive American Express card. As a result, I won’t fly Delta if I have any other choice.

A little bumpy ride . No food was being provided due the the turbulence. That was ok it was a short flight to my standards.

Simply outstanding. Their new lounge for Delta One customers is a cut above the rest.

The Dekta Rep that checked us in was great. She's very personable, pleasant, and can tell she enjoys her job.

The plane was old with small storage areas that had problems closing/latching and not enough storage for everyone, and worn, damaged seats. Service was great but feel a little unsafe on such well used planes.

A bit rush for transit. Food and entertainment are not available

Smooth boarding process. Early departure, smooth flight, early arrival. The entertainment package has very good recent movie options. The flight crew were friendly and professional.

leg space better than expected. two washrooms for one plane isn't enough.

My flight was scheduled for about 6:05 departure. There were 11 gate changes from 4-7pm and the flight was 3 hours delayed due to operational issues. The plane taxied around the airport for about half an hour before stopping to be de-iced. It would have been nice if we were alerted of the plan to de-ice prior to the 30 minute drive around the airport. The flight attendant was friendly, which was the only redeeming thing about this flight. As a former flight attendant for United, I was extremely disappointed.

Delays took 2hours and thirty minutes making me miss my connecting flight and make me sit in the Chicago airport for 9 hours

Had a short delay once we boarded the aircraft in Chicago, but it was fixed in no time flat then we were on our way. The pilot was able to make up the time lost and we landed 5 minute later then schedualed . Great service

Our seats were all the way in back of the plane,

The seats on this flight were almost roomy enough to be the basic amount needed for human existence. I think my favorite part of this flight was it landed at an A gate, which was the most palatial part of Sea-Tac I've ever seen - a massive improvement from the S gates.

The seats on this flight were almost roomy enough to be the basic amount needed for human existence.

The flight attendants in First Class were mediocre at best. They did not take our tray away until we were about to land and only did so when I press the call button. The United person at the United Club was asked to get us our boarding pass since we missed the flight due in Chicago. She argued that we did not have seats on the flight given to us in Moline. Furthermore, she was adamant that we did not have a First Class ticket. After I spent much time with her trying to show we were correct, she reluctantly agreed. She was probably the most incompetent ticketing person I have ever met and I have traveled 3 million miles on United plus many additional miles with other carriers. United has definitely deteriorated in more than on way.

I have long legs, my foot was out in the aisle and when a flight attendant came walking by and I didn't notice, instead of saying "excuse me" or anything like that, she kicked my foot. Extremely rude

Excellent! The gate agents were kind enough to rebook me on an earlier flight saving me from a 6 hour layover. Even my luggage made it despite the fact that the connection was technically too narrow. The flight itself was very comfortable, roomy, and clean. Plenty of space for my carryon items with plugs to charge my phone. After a long international flight of 14 hours, this was an excellent way to end my travels!

It was a code share with Alaska - would have been great if I actually made it on the plane, claimed I didn’t have a ticket or a seat even thought I was checked in.

Great experience. Flight boarded easily. Departed early. Smooth flight. Great arrival in DC--almost no taxing! Almost direct to gate from runway. Crew was terrific. Same cookies and beverages in main cabin. I did not use the entertainment system on this flight.

Most of the delay was due to weather which is not what was at issue here. One delay was due to a missing flashlight and in the end the flashlight was actually found on the plane. The entertainment system is very limited. Live TV options offer only a few channels that are not very appealing. Boarding and deplaning are always difficult. It just takes too much time to get on and off the plane. On the plus side, I missed my connecting flight, but was easily able to book a later flight from the app while enroute.

You were more on time than United. I'm so over united delays.

The meals were mediocre and the alcohol selection was poor. I enjoyed the selection of movies and other entertainment.

I chatted with the captain before the flight, and similarly during the welcome announcement, he warned of a turbulent flight that may impact the in-flight service. However, once at altitude, he announced that the weather changed and he immediately turned off the seatbelt sign. But it appeared the cabin crew had already decided to take off this flight. They remained seated and then just chatted in the galley. The flight was fully catered, but only first class received service.

My flight attendant was attentive! The elderly person next to me was flatulent and the flight attendant could see that I was in distress and brought me some face masks

My boarding pass wouldn't pull up in the app very easily and had to really dig through my email. That caused a delay in TSA..

Book cheap flights from Illinois to Washington

Recent round-trip flight deals

6/3Tue
1 stopSpirit Airlines
6h 55mORD-PDX
6/10Tue
1 stopSpirit Airlines
15h 15mPDX-ORD
$154
5/27Tue
1 stopSpirit Airlines
6h 55mORD-PDX
6/3Tue
1 stopSpirit Airlines
15h 15mPDX-ORD
$156
6/25Wed
nonstopAlaska Airlines
4h 39mORD-SEA
6/25Wed
nonstopAlaska Airlines
4h 05mSEA-ORD
$164
5/28Wed
nonstopDelta
4h 32mORD-SEA
6/3Tue
nonstopDelta
4h 10mSEA-ORD
$169
5/14Wed
nonstopAlaska Airlines
4h 36mORD-SEA
5/20Tue
nonstopAlaska Airlines
4h 04mSEA-ORD
$174
8/19Tue
nonstopUnited Airlines
4h 33mORD-SEA
8/26Tue
1 stopUnited Airlines
8h 05mSEA-ORD
$175
5/13Tue
nonstopUnited Airlines
4h 35mORD-PDX
5/16Fri
nonstopUnited Airlines
3h 57mPDX-ORD
$179
5/29Thu
1 stopDelta
7h 42mSTL-SEA
6/7Sat
1 stopDelta
8h 42mSEA-STL
$189
6/2Mon
1 stopAmerican Airlines
7h 26mSTL-SEA
6/9Mon
1 stopAmerican Airlines
6h 00mSEA-STL
$223
9/12Fri
1 stopAmerican Airlines
6h 56mSTL-SEA
9/15Mon
1 stopAmerican Airlines
8h 20mSEA-STL
$224

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1 stopSpirit Airlines
14h 20mORD-SEA
$61
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1 stopSpirit Airlines
6h 55mORD-PDX
$70
5/6Tue
nonstopAlaska Airlines
4h 30mORD-SEA
$79
5/28Wed
nonstopDelta
4h 32mORD-SEA
$85
6/3Tue
nonstopUnited Airlines
4h 16mORD-GEG
$88
5/29Thu
nonstopAlaska Airlines
4h 27mORD-SEA
$89
5/29Thu
nonstopDelta
4h 32mORD-SEA
$90
8/13Wed
1 stopUnited Airlines
9h 18mSTL-SEA
$90
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1 stopAmerican Airlines
8h 54mSTL-PDX
$114
5/31Sat
1 stopAmerican Airlines
6h 19mMLI-PDX
$115

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Last minute flights from Illinois to Washington

Last minute flight, train and bus deals

5/5Mon
nonstopHawaiian Airlines
4h 37mORD-SEA
5/12Mon
nonstopHawaiian Airlines
4h 06mSEA-ORD
$179
5/5Mon
multi-stopUnited Airlines
9h 00mORD-SEA
5/12Mon
nonstopUnited Airlines
4h 01mSEA-ORD
$185
5/5Mon
nonstopAlaska Airlines
4h 33mORD-PDX
5/6Tue
multi-stopAlaska Airlines
6h 26mPDX-ORD
$254
5/5Mon
multi-stopDelta
6h 42mORD-GEG
5/6Tue
multi-stopDelta
5h 16mGEG-ORD
$317
5/5Mon
multi-stopDelta
6h 15mORD-GEG
5/6Tue
multi-stopDelta
8h 38mGEG-ORD
$322
5/2Fri
multi-stopAmerican Airlines
9h 38mORD-GEG
5/4Sun
multi-stopAmerican Airlines
7h 19mGEG-ORD
$339
5/2Fri
nonstopAlaska Airlines
4h 32mORD-SEA
5/20Tue
nonstopAlaska Airlines
4h 04mSEA-ORD
$404
5/5Mon
multi-stopSouthwest
10h 50mORD-GEG
5/6Tue
multi-stopSouthwest
7h 10mGEG-ORD
$405
5/3Sat
multi-stopSouthwest
10h 40mORD-SEA
5/20Tue
multi-stopSouthwest
7h 00mSEA-ORD
$469
5/2Fri
multi-stopAmerican Airlines
9h 09mMLI-PDX
5/4Sun
multi-stopAmerican Airlines
7h 26mPDX-MLI
$489

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Everything you need to know for your flight to Washington

Cabin class types available on flights to Illinois

Cabin classes available on flights to Illinois. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

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