What is the cheapest airline that flies from Seattle/Tacoma Intl to Chicago O'Hare Intl?

Delta and United Airlines are the most popular carriers operating from Seattle/Tacoma Intl to Chicago O'Hare Intl

How many flights depart from Seattle to Chicago O'Hare Intl Airport on average per day?

As of May 2026, 45 flights take off from Seattle and land in Chicago O'Hare Intl Airport each day. The most common flight departure time for this route is 7:00a.m., with 57% of daily flights taking off at noon.

How many flights depart from Seattle to Chicago O'Hare Intl Airport on average per week?

The number of flights available between Seattle and Chicago O'Hare Intl Airport is 319 per week as of May 2026. The most frequent departure day is Fri, with 18% of weekly flights leaving on this day.

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

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

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

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 Seattle/Tacoma Intl Airport to Chicago O'Hare Intl Airport.

What documentation or ID do you need to fly to Chicago O'Hare Intl Airport?

The travel and health documents you'll need for your trip to Chicago O'Hare 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 Chicago O'Hare Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

C$ 203 Cheap Flights from Seattle to Chicago O'Hare Intl Airport in 2026

Q: What is the typical price of a round-trip flight between Seattle and Chicago O'Hare Intl Airport?

Prices are currently low for flights on this route. Typical prices usually range from C$ 635 to C$ 367. The lowest price recently found on this route was C$ 445.

1 adult

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Find the cheapest flights from Seattle to Chicago

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:12 p.m. - 5:28 a.m.

SEA

ORD

7h 16m

1 stop

9:57 p.m. - 9:49 a.m.

ORD

SEA

13h 52m

1 stop

C$ 445Frontier

Sat, 1 Aug - Mon, 3 Aug

3:19 p.m. - 8:32 p.m.

SEA

ORD

27h 13m

1 stop

9:37 p.m. - 10:06 a.m.

ORD

SEA

14h 29m

1 stop

C$ 451Frontier

Mon, 1 Jun - Thu, 4 Jun

8:12 p.m. - 5:28 a.m.

SEA

ORD

7h 16m

1 stop

9:57 p.m. - 9:49 a.m.

ORD

SEA

13h 52m

1 stop

C$ 455Frontier

Mon, 13 Jul - Sat, 18 Jul

8:12 p.m. - 5:28 a.m.

SEA

ORD

7h 16m

1 stop

9:57 p.m. - 9:49 a.m.

ORD

SEA

13h 52m

1 stop

C$ 459Frontier

Sat, 11 Jul - Tue, 14 Jul

8:12 p.m. - 5:28 a.m.

SEA

ORD

7h 16m

1 stop

9:57 p.m. - 9:49 a.m.

ORD

SEA

13h 52m

1 stop

C$ 461Frontier

Sat, 11 Jul - Tue, 14 Jul

7:41 p.m. - 8:43 p.m.

SEA

ORD

23h 02m

1 stop

9:48 p.m. - 9:48 a.m.

ORD

SEA

14h 00m

1 stop

C$ 467Frontier

Sat, 13 Jun - Tue, 16 Jun

11:58 p.m. - 5:59 a.m.

SEA

ORD

4h 01mdirect

6:03 p.m. - 8:39 p.m.

ORD

SEA

4h 36mdirect

C$ 477American Airlines

Mon, 8 Jun - Fri, 19 Jun

8:12 p.m. - 5:28 a.m.

SEA

ORD

7h 16m

1 stop

8:20 p.m. - 11:04 p.m.

ORD

SEA

4h 44mdirect

C$ 480Multiple Airlines

Mon, 13 Jul - Fri, 17 Jul

12:09 a.m. - 6:20 a.m.

SEA

ORD

4h 11mdirect

7:40 a.m. - 10:21 a.m.

ORD

SEA

4h 41mdirect

C$ 481Alaska Airlines

Wed, 27 May - Thu, 28 May

8:34 a.m. - 2:46 p.m.

SEA

ORD

4h 12mdirect

6:00 a.m. - 8:38 a.m.

ORD

SEA

4h 38mdirect

C$ 487Alaska Airlines

Sat, 11 Jul - Tue, 14 Jul

Delta flights from Seattle to Chicago O'Hare Intl Airport

Our best Delta deals on Seattle to Chicago O'Hare Intl Airport flight tickets

Delta

30 May

SEA7:35 a.m.Seattle/Tacoma Intl

4h 19m

ORD1:54 p.m.Chicago O'Hare Intl

6 Jun

ORD7:12 a.m.Chicago O'Hare Intl

4h 33m

SEA9:45 a.m.Seattle/Tacoma Intl

C$ 487

Delta

4 Jun

SEA5:45 p.m.Seattle/Tacoma Intl

4h 10m

ORD11:55 p.m.Chicago O'Hare Intl

9 Jun

ORD5:55 p.m.Chicago O'Hare Intl

4h 40m

SEA8:35 p.m.Seattle/Tacoma Intl

C$ 488

Delta

24 May

SEA7:30 a.m.Seattle/Tacoma Intl

4h 15m

ORD1:45 p.m.Chicago O'Hare Intl

30 May

ORD12:47 p.m.Chicago O'Hare Intl

4h 33m

SEA3:20 p.m.Seattle/Tacoma Intl

C$ 489

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

Our best United Airlines deals on Seattle to Chicago O'Hare Intl Airport flight tickets

United Airlines

28 May

SEA7:00 a.m.Seattle/Tacoma Intl

4h 15m

ORD1:15 p.m.Chicago O'Hare Intl

29 May

ORD2:29 p.m.Chicago O'Hare Intl

8h 24m

1 stop

SEA8:53 p.m.Seattle/Tacoma Intl

C$ 496

United Airlines

13 Jun

SEA5:15 p.m.Seattle/Tacoma Intl

4h 07m

ORD11:22 p.m.Chicago O'Hare Intl

27 Jun

ORD4:20 p.m.Chicago O'Hare Intl

4h 46m

SEA7:06 p.m.Seattle/Tacoma Intl

C$ 503

United Airlines

6 Aug

SEA5:15 p.m.Seattle/Tacoma Intl

4h 07m

ORD11:22 p.m.Chicago O'Hare Intl

9 Aug

ORD7:00 a.m.Chicago O'Hare Intl

4h 40m

SEA9:40 a.m.Seattle/Tacoma Intl

C$ 507

momondo Fare Finder

Use the filters below to find and compare flights from Seattle to Chicago O'Hare Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 1/8

8:12 p.m.-5:28 a.m.

1 stop7h 16m

Chicago O'Hare Intl

Mon 3/8

9:57 p.m.-9:49 a.m.

1 stop13h 52m

C$ 445

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Mon 1/6

3:19 p.m.-8:32 p.m.

1 stop27h 13m

Chicago O'Hare Intl

Thu 4/6

9:37 p.m.-10:06 a.m.

1 stop14h 29m

C$ 451

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Mon 13/7

8:12 p.m.-5:28 a.m.

1 stop7h 16m

Chicago O'Hare Intl

Sat 18/7

9:57 p.m.-9:49 a.m.

1 stop13h 52m

C$ 455

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 11/7

8:12 p.m.-5:28 a.m.

1 stop7h 16m

Chicago O'Hare Intl

Tue 14/7

9:57 p.m.-9:49 a.m.

1 stop13h 52m

C$ 459

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 11/7

8:12 p.m.-5:28 a.m.

1 stop7h 16m

Chicago O'Hare Intl

Tue 14/7

9:57 p.m.-9:49 a.m.

1 stop13h 52m

C$ 461

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 13/6

7:41 p.m.-8:43 p.m.

1 stop23h 02m

Chicago O'Hare Intl

Tue 16/6

9:48 p.m.-9:48 a.m.

1 stop14h 00m

C$ 467

Quickest round-trip

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Mon 8/6

11:58 p.m.-5:59 a.m.

Nonstop4h 01m

Chicago O'Hare Intl

Fri 19/6

6:03 p.m.-8:39 p.m.

Nonstop4h 36m

C$ 477

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Mon 13/7

8:12 p.m.-5:28 a.m.

1 stop7h 16m

Chicago O'Hare Intl

Fri 17/7

8:20 p.m.-11:04 p.m.

Nonstop4h 44m

C$ 480

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Wed 27/5

12:09 a.m.-6:20 a.m.

Nonstop4h 11m

Chicago O'Hare Intl

Thu 28/5

7:40 a.m.-10:21 a.m.

Nonstop4h 41m

C$ 481

SeattleChicago

SEA - ORD

SEAORD

Seattle/Tacoma Intl

Sat 11/7

8:34 a.m.-2:46 p.m.

Nonstop4h 12m

Chicago O'Hare Intl

Tue 14/7

6:00 a.m.-8:38 a.m.

Nonstop4h 38m

C$ 487

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

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

What is the cheapest month to fly to Chicago O'Hare Intl Airport?

In general, February is the cheapest month to fly from Seattle to Chicago O'Hare Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 340. The month of January is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from Seattle averaging around C$ 346.

What is the cheapest day to depart on your flight to Chicago O'Hare Intl Airport?

The cheapest day to depart on your flight to Chicago O'Hare Intl Airport is on a Thursday when prices can be found for as low as C$ 664. This is often the case because there is less demand to fly during this day of the week. When flying out on a Tuesday, the most expensive travel day of the week, you can expect to see flight prices from Seattle to Chicago O'Hare Intl Airport for around C$ 1,021.

What is the cheapest time of day to depart on your flight to Chicago O'Hare Intl Airport?

In the afternoon is the cheapest time of day to fly from Seattle to Chicago O'Hare Intl Airport when you can find flight prices for as low as C$ 342. Flying to Chicago O'Hare Intl Airport in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are C$ 983 on average. Flights to Chicago O'Hare Intl Airport from Seattle in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

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

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

You are more likely to see cheaper flights to Chicago O'Hare Intl Airport from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago O'Hare Intl Airport for around C$ 434 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago O'Hare Intl Airport from Seattle for as low as C$ 363 on momondo.

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

As of May 2026, prices for Seattle to Chicago O'Hare Intl Airport flights are approximately 51% more expensive when compared to flights at the same time last year.

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

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

Estimated round-trip price

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

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

Best price found	C$ 245
Fastest flight time	4h 01m
Direct flights	Every day

The best one-way flight to Chicago O'Hare Intl Airport from Seattle in the past 72 hours is C$ 245. The best round-trip flight deal from Seattle to Chicago O'Hare Intl Airport found on momondo in the last 72 hours is C$ 518.

The fastest flight from Seattle to Chicago O'Hare Intl Airport takes 4h 01m

Direct flights go from Seattle to Chicago O'Hare Intl Airport every day.

Search flight deals

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

How far is Seattle/Tacoma Intl to Chicago O'Hare Intl by plane?
The straight-line distance from Seattle/Tacoma Intl to Chicago O'Hare Intl is 2762.2 km. A reasonable flight in good conditions will take 4h 01m.
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Chicago O'Hare Intl Airport?
Prices for flights from Seattle/Tacoma Intl Airport to Chicago O'Hare Intl Airport are updated daily.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Chicago O'Hare Intl Airport?
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 Seattle/Tacoma Intl Airport to Chicago O'Hare Intl Airport.
What documentation or ID do you need to fly to Chicago O'Hare Intl Airport?
The travel and health documents you'll need for your trip to Chicago O'Hare 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 Chicago O'Hare 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 Seattle to Chicago O'Hare Intl Airport?
Based on momondo bookings for flights between Seattle and Chicago O'Hare Intl Airport, the leading plane model is Boeing 737-800, making up 19.82% of the total bookings. Other popular models include Boeing 737-900 with 16.20%, Airbus A321neo with 13.94%, and Boeing 737 MAX 9 with 13.23%.

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Why use momondo?

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

It is quick and easy to find Seattle to Chicago flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Chicago that suits you.

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

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

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

momondo helps you find the best flight between Seattle and Chicago by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Of course. momondo tracks the price of Seattle to Chicago 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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Cheap flights from Seattle to Chicago from C$ 239

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Chicago departing on 9/6. 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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Delta flights from Seattle to Chicago O'Hare Intl Airport

Our best Delta deals on Seattle to Chicago O'Hare Intl Airport flight tickets

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

Our best United Airlines deals on Seattle to Chicago O'Hare Intl Airport flight tickets

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Use the filters below to find and compare flights from Seattle to Chicago O'Hare Intl Airport that are best for you.

See travel insights to Chicago from

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

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

What is the cheapest month to fly to Chicago O'Hare Intl Airport?

What is the cheapest day to depart on your flight to Chicago O'Hare Intl Airport?

What is the cheapest time of day to depart on your flight to Chicago O'Hare Intl Airport?

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

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

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

What is the cheapest airline that flies from Seattle/Tacoma Intl to Chicago O'Hare Intl?

How many flights depart from Seattle to Chicago O'Hare Intl Airport on average per day?

How many flights depart from Seattle to Chicago O'Hare Intl Airport on average per week?

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

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

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

Best price found

Fastest flight time

Direct flights

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

Travelling to a place near Chicago?

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An easier way to manage your Chicago O'Hare Intl Airport trip

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