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Cheap flights from Chicago O'Hare Intl Airport to Seattle from $126

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago O'Hare Intl Airport to Seattle departing on 5/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Chicago O'Hare Intl Airport to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
9:37 pm - 9:49 am
ORD
-
SEA
14h 12m
1 stop
Frontier Logo
7:50 pm - 8:32 pm
SEA
-
ORD
22h 42m
1 stop
$239Frontier
Tue, May 12 - Thu, May 14
Frontier Logo
9:37 pm - 9:49 am
ORD
-
SEA
14h 12m
1 stop
Frontier Logo
7:50 pm - 8:32 pm
SEA
-
ORD
22h 42m
1 stop
$242Frontier
Tue, May 12 - Fri, May 15
Frontier Logo
9:37 pm - 9:49 am
ORD
-
SEA
14h 12m
1 stop
Frontier Logo
11:21 am - 6:34 am
SEA
-
ORD
17h 13m
1 stop
$243Frontier
Tue, May 19 - Thu, May 28
Frontier Logo
9:37 pm - 9:49 am
ORD
-
SEA
14h 12m
1 stop
Frontier Logo
11:21 am - 6:34 am
SEA
-
ORD
17h 13m
1 stop
$244Frontier
Tue, May 12 - Thu, May 28
Frontier Logo
9:48 pm - 9:48 am
ORD
-
SEA
14h 00m
1 stop
Frontier Logo
8:12 pm - 5:32 am
SEA
-
ORD
7h 20m
1 stop
$250Frontier
Sat, Jun 13 - Mon, Jun 15
Frontier Logo
9:13 pm - 6:26 pm
ORD
-
SEA
23h 13m
1 stop
Frontier Logo
8:12 pm - 5:32 am
SEA
-
ORD
7h 20m
1 stop
$251Frontier
Fri, Jun 12 - Wed, Jun 24
Frontier Logo
9:37 pm - 10:06 am
ORD
-
SEA
14h 29m
1 stop
Frontier Logo
7:50 pm - 8:32 pm
SEA
-
ORD
22h 42m
1 stop
$252Frontier
Tue, May 26 - Fri, May 29
Frontier Logo
9:37 pm - 9:49 am
ORD
-
SEA
14h 12m
1 stop
Frontier Logo
11:06 am - 6:39 am
SEA
-
ORD
17h 33m
1 stop
$253Frontier
Mon, May 11 - Sun, May 17
Frontier Logo
9:37 pm - 9:49 am
ORD
-
SEA
14h 12m
1 stop
Frontier Logo
11:06 am - 6:39 am
SEA
-
ORD
17h 33m
1 stop
$254Frontier
Mon, May 11 - Sun, May 17
Frontier Logo
9:37 pm - 10:06 am
ORD
-
SEA
14h 29m
1 stop
Frontier Logo
8:20 pm - 12:48 am
SEA
-
ORD
26h 28m
2 stops
$256Frontier
Thu, May 28 - Mon, Jun 8

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Frontier flights from Chicago O'Hare Intl Airport to Seattle

Our best Frontier deals on Chicago O'Hare Intl Airport to Seattle flight tickets
Frontier
May 12
ORD9:37 pmChicago O'Hare Intl
14h 12m
1 stop
SEA9:49 amSeattle/Tacoma Intl
May 14
SEA7:50 pmSeattle/Tacoma Intl
22h 42m
1 stop
ORD8:32 pmChicago O'Hare Intl
$239
Frontier
May 12
ORD9:37 pmChicago O'Hare Intl
14h 12m
1 stop
SEA9:49 amSeattle/Tacoma Intl
May 15
SEA7:50 pmSeattle/Tacoma Intl
22h 42m
1 stop
ORD8:32 pmChicago O'Hare Intl
$242
Frontier
May 19
ORD9:37 pmChicago O'Hare Intl
14h 12m
1 stop
SEA9:49 amSeattle/Tacoma Intl
May 28
SEA11:21 amSeattle/Tacoma Intl
17h 13m
1 stop
ORD6:34 amChicago O'Hare Intl
$243

Alaska Airlines flights from Chicago O'Hare Intl Airport to Seattle

Our best Alaska Airlines deals on Chicago O'Hare Intl Airport to Seattle flight tickets
Alaska Airlines
May 13
ORD6:00 amChicago O'Hare Intl
4h 34m
SEA8:34 amSeattle/Tacoma Intl
May 16
SEA5:42 pmSeattle/Tacoma Intl
4h 17m
ORD11:59 pmChicago O'Hare Intl
$240
Alaska Airlines
Aug 22
ORD8:42 pmChicago O'Hare Intl
4h 44m
SEA11:26 pmSeattle/Tacoma Intl
Aug 29
SEA6:00 amSeattle/Tacoma Intl
4h 07m
ORD12:07 pmChicago O'Hare Intl
$273
Alaska Airlines
May 11
ORD8:48 pmChicago O'Hare Intl
4h 41m
SEA11:29 pmSeattle/Tacoma Intl
May 16
SEA12:09 amSeattle/Tacoma Intl
4h 11m
ORD6:20 amChicago O'Hare Intl
$324

momondo Fare Finder

 
Customize your flight search to find flights from Chicago O'Hare Intl Airport to Seattle 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, momondo users made 832,500 searches. Data last updated April 29, 2026.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Tue 5/12

9:37 pm-9:49 am

1 stop14h 12m

Seattle/Tacoma Intl

Thu 5/14

7:50 pm-8:32 pm

1 stop22h 42m

$239

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Tue 5/12

9:37 pm-9:49 am

1 stop14h 12m

Seattle/Tacoma Intl

Fri 5/15

7:50 pm-8:32 pm

1 stop22h 42m

$242

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Tue 5/19

9:37 pm-9:49 am

1 stop14h 12m

Seattle/Tacoma Intl

Thu 5/28

11:21 am-6:34 am

1 stop17h 13m

$243

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Tue 5/12

9:37 pm-9:49 am

1 stop14h 12m

Seattle/Tacoma Intl

Thu 5/28

11:21 am-6:34 am

1 stop17h 13m

$244
Quickest round-trip

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 6/13

9:48 pm-9:48 am

1 stop14h 00m

Seattle/Tacoma Intl

Mon 6/15

8:12 pm-5:32 am

1 stop7h 20m

$250

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Fri 6/12

9:13 pm-6:26 pm

1 stop23h 13m

Seattle/Tacoma Intl

Wed 6/24

8:12 pm-5:32 am

1 stop7h 20m

$251

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Tue 5/26

9:37 pm-10:06 am

1 stop14h 29m

Seattle/Tacoma Intl

Fri 5/29

7:50 pm-8:32 pm

1 stop22h 42m

$252

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Mon 5/11

9:37 pm-9:49 am

1 stop14h 12m

Seattle/Tacoma Intl

Sun 5/17

11:06 am-6:39 am

1 stop17h 33m

$253

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Mon 5/11

9:37 pm-9:49 am

1 stop14h 12m

Seattle/Tacoma Intl

Sun 5/17

11:06 am-6:39 am

1 stop17h 33m

$254

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Thu 5/28

9:37 pm-10:06 am

1 stop14h 29m

Seattle/Tacoma Intl

Mon 6/8

8:20 pm-12:48 am

2 stops26h 28m

$256

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seattle from

How to get the cheapest flight ticket from Chicago O'Hare Intl Airport to Seattle

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 typical price of a round-trip flight between Chicago O'Hare Intl Airport and Seattle?

What is the cheapest month to fly to Seattle?

In general, January is the cheapest month to fly from Chicago O'Hare Intl Airport to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $228. If you don’t want to visit Seattle in January, then you should wait until February to fly from Chicago O'Hare Intl Airport, when ticket prices are also cheap, with an average price of $237.

What is the cheapest day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from Chicago O'Hare Intl Airport is on a Friday. momondo users have found tickets for Friday departures for as low as $335. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Monday is the most expensive day to depart from Chicago O'Hare Intl Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $450.

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

Flying to Seattle from Chicago O'Hare Intl Airport in the evening is the least expensive time of day to depart. momondo users have found prices as low as $330 when looking at flights departing in the evening. Flights to Seattle are more costly in the afternoon, with an average ticket price of $384. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Chicago O'Hare Intl to Seattle/Tacoma Intl flight route?

Fly from Chicago O'Hare Intl to Seattle/Tacoma Intl for the best Chicago O'Hare Intl - Seattle/Tacoma Intl flight prices

How far in advance should I book a flight from Chicago O'Hare Intl Airport to Seattle?

You are more likely to see cheaper flights to Seattle from Chicago O'Hare Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $287 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Chicago O'Hare Intl Airport for as low as $251 on momondo.

Can stopping save me money on Chicago O'Hare Intl Airport to Seattle flights?

You could potentially save up to 30% on your flight if you consider stops on a Chicago O'Hare Intl Airport to Seattle flight.

How have Chicago O'Hare Intl Airport to Seattle flight prices changed over time?

As of April 2026, prices for Chicago O'Hare Intl Airport to Seattle flights are approximately 78% more expensive when compared to flights at the same time last year.

When to book flights from Chicago O'Hare Intl Airport to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Chicago O'Hare Intl Airport to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Chicago O'Hare Intl Airport to Seattle (ORD to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago O'Hare Intl Airport to Seattle

Best Price Found

$180

Fastest flight time

4h 30m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from Chicago O'Hare Intl Airport in the past 72 hours is $180. The best round-trip flight deal from Chicago O'Hare Intl Airport to Seattle found on momondo in the last 72 hours is $366.
The fastest flight from Chicago O'Hare Intl Airport to Seattle takes 4h 30m
Direct flights go from Chicago O'Hare Intl Airport to Seattle every day.
There is 1 airport in Seattle. From Chicago O'Hare Intl Airport there are direct flights to Seattle/Tacoma Intl (SEA).
Search flight deals

Frequently asked questions about flying from Chicago O'Hare Intl Airport to Seattle

  • How far is Chicago O'Hare Intl to Seattle/Tacoma Intl by plane?

    Seattle/Tacoma Intl is 1716.3 mi away from Chicago O'Hare Intl. A reasonable flight in good conditions will take 4h 30m.

  • When did momondo last update prices for flights from Chicago O'Hare Intl Airport to Seattle/Tacoma Intl Airport?

    Prices for flights from Chicago O'Hare Intl Airport to Seattle/Tacoma Intl Airport refresh daily.

  • How many operators does momondo search for flights from Chicago O'Hare Intl Airport to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from Chicago O'Hare Intl Airport to Seattle/Tacoma Intl Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Chicago O'Hare Intl Airport to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The travel and health documents you'll need for your trip to Seattle/Tacoma Intl Airport 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 Seattle/Tacoma Intl Airport. 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 Chicago O'Hare Intl Airport to Seattle?

  • What is the most popular airline from Chicago O'Hare Intl Airport to Seattle?

Best airlines flying from Chicago O'Hare Intl Airport to Seattle

Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport to Seattle with momondo
Airline
Rating
Free Cancellation
Price
Hawaiian AirlinesPriceFrom $84Free CancellationRating
7.8
2,837 reviews
Search Hawaiian Airlines flights
DeltaPriceFrom $110Free CancellationRating
7.9
8,470 reviews
Search Delta flights
FrontierPriceFrom $153Free CancellationRating
5.6
2,970 reviews
Search Frontier flights
Alaska AirlinesPriceFrom $168Free CancellationRating
7.9
12,312 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $174Free CancellationRating
7.1
11,682 reviews
Search American Airlines flights
United AirlinesPriceFrom $177Free CancellationRating
7.4
9,681 reviews
Search United Airlines flights

  • Delta Flights From Chicago O'Hare Intl Airport to Seattle

    Delta operates around 20 flights from Chicago O'Hare Intl Airport to Seattle every week. The average price of these flights found in the last 72 hours has been $270, but momondo users have found Delta deals from Chicago O'Hare Intl Airport to Seattle from as low as $110 round-trip. Delta has been scored 7.9/10 in 8,470 reviews.

  • Alaska Airlines Flights From Chicago O'Hare Intl Airport to Seattle

    Across 12,312 Alaska Airlines reviews on momondo, the average score is 7.9/10. Alaska Airlines flies from Chicago O'Hare Intl Airport to Seattle about 16 times each week, with ticket deals ranging from $168 to $295. Price data is based on momondo searches in the last 72 hours.

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
SeaTac
Ocean Shores
Renton
Olympia
Lynnwood
Redmond
Kent
Marysville
Puyallup
Tukwila
Lakewood
Cle Elum
Federal Way
Centralia
Fife
Shoreline
Westport
Tumwater

Why use momondo?

Why should I use momondo to find a flight deal from Chicago to Seattle?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Seattle from Chicago.

Can I find flights from Chicago to Seattle with flexible booking policies on momondo?

momondo does allow users to show only those flights to Seattle from Chicago which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Chicago to Seattle?

momondo provides multiple filters to help you find the best flight to Seattle from Chicago. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Price alerts on flights to Seattle from Chicago are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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