What is the cheapest airline that flies from Illinois to Washington?

Spirit Airlines, Hawaiian Airlines, and United Airlines are the most popular carriers operating from Illinois to Washington

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

As of August 2025, there are 89 flights per day flying from Illinois to State of Washington. The most common time of day flights depart is 5:00PM, with 36% of flights taking off in the afternoon.

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

If you’re flying from a popular airport in Illinois, such as Chicago or Moline, and flying into State of Washington, then you can expect flight times to average 4h 28m and 6h 49m, respectively.

What airlines fly to State of Washington?

Alaska Airlines, Delta and American Airlines are the top three most popular airlines that fly to State of Washington from Illinois according to our data. Alaska Airlines is the first choice among our users, with 32% of people opting to fly with this airline when traveling to State of Washington. Keep in mind that there are 8 different airlines that fly to State of Washington on a routine basis, so you have a few additional options to choose from.

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

As of August 2025, 626 flights take off from Illinois and land in State of Washington each week. The most common flight departure day for this route is Sat, with 19% of weekly flights taking off on this day.

When did momondo last update prices for flights from Illinois to Washington?

Prices for flights from Illinois to Washington were last updated today.

How many operators does momondo search for flights from Illinois to Washington?

As of August 2025, there are 8 operators available to choose from for flights from Illinois to Washington.

How old do you have to be to fly from Illinois to Washington?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to Washington.

What documentation or ID do you need to fly to Washington?

The travel and health documents you'll need for your trip to Washington may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Washington. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$68 Cheap Flights from Illinois to Washington in 2025

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Find the cheapest flights from Illinois to Washington

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

7:00 am - 2:26 pmORD-SEA

9h 26m1 stop

5:55 pm - 11:59 pmSEA-ORD

4h 04mnonstop

$159Hawaiian Airlines

Find Deal

Sat, Aug 23 - Sat, Aug 30

7:00 am - 2:26 pmORD-SEA

9h 26m1 stop

5:55 pm - 11:59 pmSEA-ORD

4h 04mnonstop

$163Hawaiian Airlines

Find Deal

Sat, Aug 23 - Sat, Aug 30

5:49 pm - 10:59 pmSTL-SEA

7h 10m1 stop

7:00 am - 3:44 pmSEA-STL

6h 44m1 stop

$168United Airlines

Find Deal

Sat, Sep 20 - Tue, Sep 23

5:49 pm - 10:59 pmSTL-SEA

7h 10m1 stop

7:00 am - 3:44 pmSEA-STL

6h 44m1 stop

$174United Airlines

Find Deal

Tue, Sep 9 - Fri, Sep 12

2:25 pm - 7:00 pmSTL-SEA

6h 35m1 stop

5:30 am - 1:44 pmSEA-STL

6h 14m1 stop

$177Delta

Find Deal

Wed, Sep 10 - Sat, Sep 13

7:00 am - 9:25 amORD-PDX

4h 25mnonstop

7:00 am - 1:09 pmPDX-ORD

4h 09mnonstop

$179Alaska Airlines

Find Deal

Sat, Aug 30 - Sun, Aug 31

7:00 pm - 11:59 pmSTL-SEA

6h 59m1 stop

11:40 pm - 8:37 amSEA-STL

6h 57m1 stop

$183Delta

Find Deal

Fri, Sep 12 - Tue, Sep 16

6:50 am - 9:19 amORD-SEA

4h 29mnonstop

3:09 pm - 9:14 pmSEA-ORD

4h 05mnonstop

$183American Airlines

Find Deal

Sat, Aug 23 - Sat, Aug 30

8:00 am - 10:40 amORD-SEA

4h 40mnonstop

5:50 pm - 11:59 pmSEA-ORD

4h 09mnonstop

$186Alaska Airlines

Find Deal

Sat, Oct 11 - Sat, Oct 18

6:45 am - 9:21 amORD-SEA

4h 36mnonstop

1:02 pm - 7:25 pmSEA-ORD

4h 23mnonstop

$188American Airlines

Find Deal

Wed, Sep 10 - Wed, Sep 17

Alaska Airlines flights from Illinois to State of Washington

Our best Alaska Airlines deals on Illinois to State of Washington flight tickets

Alaska Airlines

Aug 30

ORD7:00 amChicago O'Hare Intl

4h 25m

PDX9:25 amPortland

Aug 31

PDX7:00 amPortland

4h 09m

ORD1:09 pmChicago O'Hare Intl

$179

Find similar

Alaska Airlines

Oct 11

ORD8:00 amChicago O'Hare Intl

4h 40m

SEA10:40 amSeattle/Tacoma Intl

Oct 18

SEA5:50 pmSeattle/Tacoma Intl

4h 09m

ORD11:59 pmChicago O'Hare Intl

$186

Find similar

Alaska Airlines

Jan 9

ORD7:45 amChicago O'Hare Intl

4h 51m

SEA10:36 amSeattle/Tacoma Intl

Jan 9

SEA1:45 pmSeattle/Tacoma Intl

22h 14m

1 stop

ORD1:59 pmChicago O'Hare Intl

$187

Find similar

Hawaiian Airlines flights from Illinois to State of Washington

Our best Hawaiian Airlines deals on Illinois to State of Washington flight tickets

Hawaiian Airlines

Aug 23

ORD7:00 amChicago O'Hare Intl

9h 26m

1 stop

SEA2:26 pmSeattle/Tacoma Intl

Aug 30

SEA5:55 pmSeattle/Tacoma Intl

4h 04m

ORD11:59 pmChicago O'Hare Intl

$159

Find similar

Hawaiian Airlines

Aug 23

ORD7:00 amChicago O'Hare Intl

9h 26m

1 stop

SEA2:26 pmSeattle/Tacoma Intl

Aug 30

SEA5:55 pmSeattle/Tacoma Intl

4h 04m

ORD11:59 pmChicago O'Hare Intl

$163

Find similar

Hawaiian Airlines

Aug 23

ORD6:20 amChicago O'Hare Intl

4h 30m

SEA8:50 amSeattle/Tacoma Intl

Aug 30

SEA5:55 pmSeattle/Tacoma Intl

4h 04m

ORD11:59 pmChicago O'Hare Intl

$165

Find similar

Fly from

Fly to

Route

Depart

Return

Price

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 8/23

7:00 am-2:26 pm

1 stop9h 26m

Seattle/Tacoma Intl

Sat 8/30

5:55 pm-11:59 pm

Nonstop4h 04m

$159

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 8/23

7:00 am-2:26 pm

1 stop9h 26m

Seattle/Tacoma Intl

Sat 8/30

5:55 pm-11:59 pm

Nonstop4h 04m

$163

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Sat 9/20

5:49 pm-10:59 pm

1 stop7h 10m

Seattle/Tacoma Intl

Tue 9/23

7:00 am-3:44 pm

1 stop6h 44m

$168

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Tue 9/9

5:49 pm-10:59 pm

1 stop7h 10m

Seattle/Tacoma Intl

Fri 9/12

7:00 am-3:44 pm

1 stop6h 44m

$174

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Wed 9/10

2:25 pm-7:00 pm

1 stop6h 35m

Seattle/Tacoma Intl

Sat 9/13

5:30 am-1:44 pm

1 stop6h 14m

$177

ChicagoPortland

ORD - PDX

ORDPDX

Chicago O'Hare Intl

Sat 8/30

7:00 am-9:25 am

Nonstop4h 25m

Portland

Sun 8/31

7:00 am-1:09 pm

Nonstop4h 09m

$179

St. LouisSeattle

STL - SEA

STLSEA

Lambert-St Louis

Fri 9/12

7:00 pm-11:59 pm

1 stop6h 59m

Seattle/Tacoma Intl

Tue 9/16

11:40 pm-8:37 am

1 stop6h 57m

$183

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 8/23

6:50 am-9:19 am

Nonstop4h 29m

Seattle/Tacoma Intl

Sat 8/30

3:09 pm-9:14 pm

Nonstop4h 05m

$183

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 10/11

8:00 am-10:40 am

Nonstop4h 40m

Seattle/Tacoma Intl

Sat 10/18

5:50 pm-11:59 pm

Nonstop4h 09m

$186

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 9/10

6:45 am-9:21 am

Nonstop4h 36m

Seattle/Tacoma Intl

Wed 9/17

1:02 pm-7:25 pm

Nonstop4h 23m

$188

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How to get the cheapest flight ticket from Illinois to State of Washington

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

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

The month of February is, on average, the cheapest month to fly to State of Washington from Illinois, with most prices found around $214. If you aren’t able to travel to State of Washington during the month of February, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $221.

What is the cheapest day to depart on your flight to State of Washington?

The cheapest day to depart from Illinois to State of Washington is on a Wednesday. Travelers who choose to depart for State of Washington on a Wednesday will often find tickets for as low as $329. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Illinois to State of Washington for around $448.

What is the cheapest time of day to depart on your flight to State of Washington?

The cheapest time of day to fly to State of Washington is in the evening when flights can be purchased for as low as $325. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $376 on average. Flights to State of Washington from Illinois in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Illinois to Washington flight route?

Fly from Chicago Midway to Spokane for the best Illinois - Washington flight prices

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

You are more likely to see cheaper flights to State of Washington from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to State of Washington for around $282 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to State of Washington from Illinois for as low as $242 on momondo.

What cabin class options are available on Illinois to Washington flights?

There are 4 cabin classes available to choose from on Illinois to Washington flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Illinois to State of Washington flights?

You could potentially save up to 32% on your flight if you consider stops on a Illinois to State of Washington flight.

Cheap Illinois to State of Washington flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to State of Washington

Best Price Found	$68
Fastest flight time	3h 52m
Direct flights	Every day
Airports in State of Washington	3 airports

The best one-way flight to State of Washington from Illinois in the past 72 hours is $68. The best round-trip flight deal from Illinois to State of Washington found on momondo in the last 72 hours is $159.

The fastest flight from Illinois to State of Washington takes 3h 52m

Direct flights go from Illinois to State of Washington every day.

There are 3 airports near State of Washington: Portland (PDX), Spokane (GEG), Seattle/Tacoma Intl (SEA)

Search flight deals

When did momondo last update prices for flights from Illinois to Washington?
Prices for flights from Illinois to Washington were last updated today.
How many operators does momondo search for flights from Illinois to Washington?
As of August 2025, there are 8 operators available to choose from for flights from Illinois to Washington.
How old do you have to be to fly from Illinois to Washington?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to Washington.
What documentation or ID do you need to fly to Washington?
The travel and health documents you'll need for your trip to Washington may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Washington. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Illinois to State of Washington?
momondo data reveals that the most frequently booked plane model on the route from Illinois to State of Washington is Boeing 737-900 Passenger/BBJ3 (winglets), representing 17.79% of all bookings. The subsequent popular models are Boeing 737-800 Passenger/BBJ2 (winglets) at 13.39%, Boeing 737-800 at 12.25%, and Airbus A321-100/200 at 9.82%.

Best airlines flying from Illinois to State of Washington

Compare and see reviews for airlines that fly from Illinois to State of Washington with momondo

Airline	Rating	Free Cancellation	Price
Hawaiian Airlines	PriceFrom $92	Free Cancellation	Rating 7.8 2,613 reviews	Search Hawaiian Airlines flights
Spirit Airlines	PriceFrom $98	Free Cancellation	Rating 6.3 8,054 reviews	Search Spirit Airlines flights
Frontier	PriceFrom $118	Free Cancellation	Rating 5.8 3,241 reviews	Search Frontier flights
Delta	PriceFrom $122	Free Cancellation	Rating 8.0 7,983 reviews	Search Delta flights
Alaska Airlines	PriceFrom $156	Free Cancellation	Rating 8.0 10,000 reviews	Search Alaska Airlines flights
United Airlines	PriceFrom $167	Free Cancellation	Rating 7.4 8,904 reviews	Search United Airlines flights
American Airlines	PriceFrom $168	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Southwest	PriceFrom $194	Free Cancellation	Rating 8.0 4,246 reviews	Search Southwest flights

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to Washington?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Illinois to Washington. momondo saves you time and could save you money on your trip.

Can I find flights from Illinois to Washington with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Illinois to Washington flights to just show those with flexible booking policies.

How can momondo help me find flights from Illinois to Washington?

Once you have performed a search for Illinois to Washington flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Illinois to Washington right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Washington, momondo offers a useful price alert feature which will track prices for flights to Washington from Illinois and alert you when they change.

An easier way to manage your State of Washington trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Cheap flights from Illinois to Washington from $68

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Washington departing on 9/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

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Find the cheapest flights from Illinois to Washington

Cheap round-trip flights

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Cheap last minute flights

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Alaska Airlines flights from Illinois to State of Washington

Our best Alaska Airlines deals on Illinois to State of Washington flight tickets

Hawaiian Airlines flights from Illinois to State of Washington

Our best Hawaiian Airlines deals on Illinois to State of Washington flight tickets

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How to get the cheapest flight ticket from Illinois to State of Washington

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

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

What is the cheapest day to depart on your flight to State of Washington?

What is the cheapest time of day to depart on your flight to State of Washington?

What is the cheapest Illinois to Washington flight route?

Fly from Chicago Midway to Spokane for the best Illinois - Washington flight prices

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

What cabin class options are available on Illinois to Washington flights?

There are 4 cabin classes available to choose from on Illinois to Washington flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Illinois to State of Washington flights?

You could potentially save up to 32% on your flight if you consider stops on a Illinois to State of Washington flight.

What is the cheapest airline that flies from Illinois to Washington?

Spirit Airlines, Hawaiian Airlines, and United Airlines are the most popular carriers operating from Illinois to Washington

What airlines fly to State of Washington?

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

As of August 2025, there are 89 flights per day flying from Illinois to State of Washington. The most common time of day flights depart is 5:00PM, with 36% of flights taking off in the afternoon.

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

As of August 2025, 626 flights take off from Illinois and land in State of Washington each week. The most common flight departure day for this route is Sat, with 19% of weekly flights taking off on this day.

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

If you’re flying from a popular airport in Illinois, such as Chicago or Moline, and flying into State of Washington, then you can expect flight times to average 4h 28m and 6h 49m, respectively.

Cheap Illinois to State of Washington flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to State of Washington

Best Price Found

Fastest flight time

Direct flights

Airports in State of Washington

When did momondo last update prices for flights from Illinois to Washington?

How many operators does momondo search for flights from Illinois to Washington?

How old do you have to be to fly from Illinois to Washington?

What documentation or ID do you need to fly to Washington?

What is the most popular plane model from Illinois to State of Washington?

Best airlines flying from Illinois to State of Washington

Compare and see reviews for airlines that fly from Illinois to State of Washington with momondo

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to Washington?

Can I find flights from Illinois to Washington with flexible booking policies on momondo?

How can momondo help me find flights from Illinois to Washington?

I’m not ready to book a flight from Illinois to Washington right now. Can momondo alert me if prices change?

An easier way to manage your State of Washington trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Washington

Popular cities in Washington

Popular flights according to clicks in the last 7 days on momondo