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Cheap flights from Chicago O'Hare Intl Airport to Seattle from £72

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/8. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SEA
16 Jul — 23 Jul1
1 adult

Cheapflights Tip: The best prices from Chicago O'Hare Intl to Seattle/Tacoma Intl are usually found in September or February, booked 42 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from O'Hare Intl to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from O'Hare Intl (ORD) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 11 July 2025.

Round-trip from

£124

One-way from

£72

Popular in

December

Cheapest in

September

Average price

£248
Southwest
  • Southwest
  • 30/9-14/10
  • 3 total stops
  • 17h 20m total
  • Chicago to Seattle
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United Airlines
  • United Airlines
  • 4/8
  • Nonstop
  • 4h 43m total
  • Chicago to Seattle
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (£9 potential increase over avg. return price).
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Cheapest flight prices on average. 2% potential price decrease (£4 potential savings vs. average return price).
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Average for round-trip flights in July 2025
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Find flight deals from O'Hare Intl to Seattle

Cheapest flights from O'Hare Intl to Seattle
Explore the most affordable flight options available from O'Hare Intl to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 July 2025.

Tue 30/915:10ORD - SEA
1 stop8h 30mSouthwest
Tue 14/1012:50SEA - ORD
2 stops8h 50mSouthwest
Deal found 11/7£124
Fri 22/819:20ORD - SEA
1 stop6h 46mDelta
Sun 24/807:10SEA - ORD
Nonstop4h 07mDelta
Deal found 10/7£127
Thu 11/906:20ORD - SEA
Nonstop4h 32mAlaska Airlines
Mon 15/923:15SEA - ORD
1 stop11h 56mAlaska Airlines
Deal found 10/7£128
Mon 1/906:20ORD - SEA
Nonstop4h 32mHawaiian Airlines
Mon 15/917:55SEA - ORD
Nonstop4h 08mHawaiian Airlines
Deal found 10/7£130
Tue 5/805:00ORD - SEA
1 stop6h 59mUnited Airlines
Tue 5/800:20SEA - ORD
Nonstop4h 08mUnited Airlines
Deal found 9/7£142

Cheapflights Fare Finder

Customise your flight search to find flights from O'Hare Intl 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, Cheapflights users made 858,174 searches. Data last updated 11 July 2025.
Use the filters below to find and compare flights from Chicago O'Hare Intl Airport to Seattle that are best for you.

Fly from

O'Hare Intl

Fly to

Seattle

Route

Depart

Return

Price

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Tue 30/9

15:10-21:40

1 stop8h 30m

Seattle/Tacoma Intl

Tue 14/10

12:50-23:40

2 stops8h 50m

£124

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Fri 22/8

19:20-00:06

1 stop6h 46m

Seattle/Tacoma Intl

Sun 24/8

07:10-13:17

Nonstop4h 07m

£127

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Thu 11/9

06:20-08:52

Nonstop4h 32m

Seattle/Tacoma Intl

Mon 15/9

23:15-13:11

1 stop11h 56m

£128

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Mon 1/9

06:20-08:52

Nonstop4h 32m

Seattle/Tacoma Intl

Mon 15/9

17:55-00:03

Nonstop4h 08m

£130

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Tue 5/8

05:00-09:59

1 stop6h 59m

Seattle/Tacoma Intl

Tue 5/8

00:20-06:28

Nonstop4h 08m

£142

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Mon 4/8

21:16-23:59

Nonstop4h 43m

£72

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Thu 7/8

07:00-14:25

1 stop9h 25m

£73

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Fri 12/9

14:55-21:45

1 stop8h 50m

£74

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Fri 29/8

07:00-14:26

1 stop9h 26m

£89

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 23/7

07:11-09:45

Nonstop4h 34m

£92

Flights are sorted by cheapest return flights first.

Deals found on 9/7

Showing 1-10 of 11 results
1
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Best time to book a flight from O'Hare Intl to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from O'Hare Intl with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Chicago O'Hare Intl Airport to Seattle

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

Use this chart to determine the optimal time to book a return flight from O'Hare Intl to Seattle. Price data was last updated on 27 June 2025.

The best time to book flights from Chicago O'Hare Intl Airport to Seattle is 42 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to Seattle?

Currently, January is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Seattle (average of £622). Flying from Chicago O'Hare Intl Airport to Seattle in July is currently the most expensive (average of £946). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ORD to SEA?

Find hourly flight availability from O'Hare Intl to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 11 July 2025.

A simple way to save on the total cost of your ticket is to fly from Chicago O'Hare Intl Airport to Seattle in the afternoon. If you’re flexible enough to do this you can expect to save up to 39% on your trip compared to booking a flight at midday.

Weekly flight availability from Chicago O'Hare Intl Airport to Seattle

Explore weekly flight availability from O'Hare Intl to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 11 July 2025.

The most flights from ORD to SEA are scheduled on a Thursday (73 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (27 on average).

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated 11 July 2025.
See what other customers who have flown with Alaska Airlines, Southwest, andDelta from Chicago O'Hare Intl Airport to Seattle have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Entertainment

7.1

Crew

8.5

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very Good
10,000 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Entertainment

7.1

Crew

8.5

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very Good
4,249 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Entertainment

7.1

Crew

8.5

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very Good
7,951 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Entertainment

7.1

Crew

8.5

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Hawaiian Airlines
7.8
Good
2,564 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Entertainment

7.1

Crew

8.5

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,848 reviews
Alaska Airlines
8.0
Very Good
10,000 reviews
Check prices

Entertainment

7.1

Crew

8.5

Comfort

7.8

Food

7.1

Overall

8.0

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

Find useful and relevant information for your journey from O'Hare Intl to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Seattle from Chicago O'Hare Intl?

    Seattle/Tacoma Intl (SEA) is the airport you will fly into if you book a flight from Chicago O'Hare Intl to Seattle. You should not have trouble finding flights to Seattle/Tacoma Intl from Chicago O'Hare Intl; the airport handles an average of 56 inbound flights from Chicago O'Hare Intl per day. You should also have plenty of airline options to choose from since 0 airlines have flights to the Seattle airport from Chicago O'Hare Intl. It is only a 11.4 mi journey from Seattle/Tacoma Intl (SEA) to Seattle’s city center.

  • What are the cheapest airlines flying from Chicago O'Hare Intl Airport to Seattle round-trip?

    According to our current data, Southwest (£124), Delta (£127), and Alaska Airlines (£128) offers the cheapest pricing from Chicago O'Hare Intl Airport to Seattle. Southwest is priced at 40% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Chicago O'Hare Intl Airport to Seattle one-way?

    To fly one-way, consider booking your trip with United Airlines, which is currently one of the cheapest options available, starting at £72. Alaska Airlines flights start at £73 while deals on Southwest start at £75 one-way.

  • What are the most reliable airlines from Chicago O'Hare Intl Airport to Seattle?

    Before booking your flight to Seattle from Chicago O'Hare Intl Airport, check out the most reliable airlines to get you to your destination on time: Austrian Airlines (85%), Brussels Airlines (83%), Air France( 83%).

  • Can I find deals for flights from O'Hare Intl to Seattle that include hotel bookings?

    Yes. In addition to deals on O'Hare Intl to Seattle flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from O'Hare Intl to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from O'Hare Intl to Seattle.

  • Can I find deals for business class flights from O'Hare Intl to Seattle?

    Yes. Cheapflights offers flight deals from O'Hare Intl to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Chicago O'Hare Intl Airport to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Chicago O'Hare Intl Airport to Seattle (average of £622). Flying from Chicago O'Hare Intl Airport to Seattle in July is currently the most expensive (average of £946). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Chicago O'Hare Intl Airport?

Book flights to Chicago O'Hare Intl Airport if you plan to visit one of these locations
Tacoma
Leavenworth
Bothell
SeaTac

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Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Seattle from O'Hare Intl today and book when prices fit your budget.

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