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Cheap flights from Chicago to Seattle from £66

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 to Seattle departing on 12/8. 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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Find the cheapest flights from Chicago to Seattle

Cheap return flights

KAYAK's recommended return flight deals from the most popular airlines that fly from Chicago to Seattle.
08:00 - 10:35ORD-SEA
4h 35mdirect
15:55 - 22:03SEA-ORD
4h 08mdirect
£126Hawaiian Airlines
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Wed, 3 Sep - Wed, 3 Sep
12:48 - 15:25ORD-SEA
4h 37mdirect
17:45 - 23:44SEA-ORD
3h 59mdirect
£131Delta
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Wed, 3 Sep - Sat, 13 Sep
20:42 - 23:22ORD-SEA
4h 40mdirect
17:51 - 23:59SEA-ORD
4h 08mdirect
£135Alaska Airlines
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Sun, 31 Aug - Sat, 20 Sep
07:00 - 13:59ORD-SEA
8h 59m1 stop
07:00 - 13:06SEA-ORD
4h 06mdirect
£135United Airlines
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Wed, 23 Apr - Tue, 29 Apr
06:00 - 08:30ORD-SEA
4h 30mdirect
08:00 - 23:56SEA-ORD
13h 56m1 stop
£138Alaska Airlines
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Tue, 13 May - Tue, 20 May
06:15 - 11:45ORD-SEA
7h 30m1 stop
08:10 - 17:55SEA-ORD
7h 45m1 stop
£145Southwest
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Wed, 3 Sep - Sat, 13 Sep
21:16 - 23:59ORD-SEA
4h 43mdirect
23:45 - 05:48SEA-ORD
4h 03mdirect
£148United Airlines
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Tue, 1 Jul - Tue, 8 Jul
14:50 - 23:50ORD-SEA
11h 00m1 stop
05:00 - 14:00SEA-ORD
7h 00m1 stop
£150Southwest
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Wed, 30 Apr - Wed, 7 May
20:10 - 10:58ORD-SEA
16h 48m1 stop
18:10 - 18:45SEA-ORD
22h 35m1 stop
£244Sun Country Air
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Mon, 1 Sep - Wed, 8 Oct
20:05 - 17:27ORD-SEA
23h 22m1 stop
18:30 - 19:09SEA-ORD
22h 39m1 stop
£267Sun Country Air
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Thu, 15 May - Sun, 18 May

Hawaiian Airlines flights from Chicago to Seattle

Our best Hawaiian Airlines deals on Chicago to Seattle flight tickets
Hawaiian Airlines
3 Sept
ORD08:00Chicago O'Hare Intl
4h 35m
SEA10:35Seattle/Tacoma Intl
3 Sept
SEA15:55Seattle/Tacoma Intl
4h 08m
ORD22:03Chicago O'Hare Intl
Hawaiian Airlines
18 Apr
ORD07:00Chicago O'Hare Intl
4h 36m
SEA09:36Seattle/Tacoma Intl
20 Apr
SEA23:36Seattle/Tacoma Intl
4h 04m
ORD05:40Chicago O'Hare Intl
Hawaiian Airlines
25 Apr
ORD19:19Chicago O'Hare Intl
4h 41m
SEA22:00Seattle/Tacoma Intl
27 Apr
SEA23:59Seattle/Tacoma Intl
4h 06m
ORD06:05Chicago O'Hare Intl

Alaska Airlines flights from Chicago to Seattle

Our best Alaska Airlines deals on Chicago to Seattle flight tickets
Alaska Airlines
31 Aug
ORD20:42Chicago O'Hare Intl
4h 40m
SEA23:22Seattle/Tacoma Intl
20 Sept
SEA17:51Seattle/Tacoma Intl
4h 08m
ORD23:59Chicago O'Hare Intl
Alaska Airlines
13 May
ORD06:00Chicago O'Hare Intl
4h 30m
SEA08:30Seattle/Tacoma Intl
20 May
SEA08:00Seattle/Tacoma Intl
13h 56m
1 stop
ORD23:56Chicago O'Hare Intl
Alaska Airlines
10 Apr
ORD07:00Chicago O'Hare Intl
4h 36m
SEA09:36Seattle/Tacoma Intl
19 Apr
SEA10:45Seattle/Tacoma Intl
4h 08m
ORD16:53Chicago O'Hare Intl

See travel insights to Seattle from

How to get the cheapest flight ticket from Chicago 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 cheapest month to fly to Seattle?

The cheapest month to fly to Seattle from Chicago is in February. Flight prices, which tend to average around £165, are often lower during this time because this is during the off-season. The month of September is another great option to travel to Seattle, with average flight prices from Chicago averaging around £176.

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

According to our data, Sunday is the cheapest day to fly to Seattle from Chicago. The lowest ticket price found for a Sunday departure recently was £0. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to Seattle on Saturday is £1,097.

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

According to our data, the cheapest time of day to fly to Seattle is at midday. momondo users have found flights departing from Chicago to Seattle at midday for as low as £0. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the afternoon are often more expensive, with an average ticket price of £366.

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

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

How far in advance should I book a flight to Seattle?

You are more likely to see cheaper flights to Seattle from Chicago when booking 6 weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around £224 when searching 6 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Chicago for as low as £194 on momondo.

What cabin class options are available on Chicago to Seattle/Tacoma Intl flights?

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

How have Chicago to Seattle flight prices changed over time?

As of March 2025, prices for Chicago to Seattle flights are approximately 21% more expensive when compared to flights at the same time last year.

When to book flights from Chicago to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Chicago to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Chicago to Seattle (CHI to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Chicago to Seattle

Best price found

£66

Fastest flight time

4h 27m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from Chicago in the past 72 hours is £66. The best return flight deal from Chicago to Seattle found on momondo in the last 72 hours is £126.
The fastest flight from Chicago to Seattle takes 4h 27m
Direct flights go from Chicago to Seattle every day.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)

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

    The straight-line distance from Chicago to Seattle/Tacoma Intl is 1732.3 mi. By plane, this route typically takes 4h 27m.

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

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

  • How old do you have to be to fly from Chicago 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 to Seattle/Tacoma Intl Airport.

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

    The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Chicago to Seattle?


Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Kent
Tukwila
SeaTac
Fife
Mukilteo
Renton

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Chicago to Seattle for you.

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

Yes. All flights to Seattle from Chicago on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search for Chicago to Seattle 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 Chicago to Seattle right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Chicago to Seattle flights. All you need is a valid email address and we will do the rest; it is that quick and easy.


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