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Cheap flights from Chicago to Seattle from £70

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 29/4. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — SEA
1 Apr — 8 Apr1
1 adult

Cheapflights Tip: The best prices from Chicago to Seattle/Tacoma Intl are usually found in February or September, booked 62 days in advance, depart on a Wednesday or Monday and return on a Monday

Cheap flight deals from Chicago to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Chicago (CHI) 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 27 March 2025.

Round-trip from

£131

One-way from

£70

Popular in

July

Cheapest in

February

Average price

£246

Good round-trip deal

£192 or less

Good one-way deal

£161 or less
Hawaiian Airlines
  • Hawaiian Airlines
  • 23/4-26/4
  • Nonstop
  • 8h 37m total
  • Chicago to Seattle
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United Airlines
  • United Airlines
  • 29/4
  • 1 total stop
  • 8h 59m total
  • Chicago to Seattle
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Highest demand for flights based on searches. 17% potential increase in price (£37 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£6 potential savings vs. average return price).
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Average for round-trip flights in March 2025
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Price to beat on a round-trip flight from Chicago (CHI) to Seattle/Tacoma Intl.
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Price to beat on a one-way flight from Chicago (CHI) to Seattle/Tacoma Intl.
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Find flight deals from Chicago to Seattle

Cheapest flights from Chicago to Seattle
Explore the most affordable flight options available from Chicago to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 March 2025.

Wed 23/417:56ORD - SEA
Nonstop4h 36mHawaiian Airlines
Sat 26/417:58SEA - ORD
Nonstop4h 01mHawaiian Airlines
Deal found 27/3£131
Sun 31/806:24ORD - SEA
Nonstop4h 36mAlaska Airlines
Tue 16/917:51SEA - ORD
Nonstop4h 08mAlaska Airlines
Deal found 26/3£135
Wed 16/407:00ORD - SEA
1 stop8h 59mUnited Airlines
Tue 22/423:45SEA - ORD
Nonstop4h 01mUnited Airlines
Deal found 26/3£136
Sat 10/518:59ORD - SEA
Nonstop4h 43mDelta
Tue 20/517:50SEA - ORD
Nonstop4h 09mDelta
Deal found 25/3£154
Wed 14/509:55ORD - SEA
2 stops30h 30mMultiple Airlines
Wed 28/516:19SEA - ORD
Nonstop4h 04mMultiple Airlines
Deal found 26/3£156
Sat 7/617:25ORD - SEA
1 stop7h 45mSouthwest
Sat 16/808:10SEA - ORD
1 stop7h 45mSouthwest
Deal found 25/3£161
Wed 14/509:55ORD - SEA
2 stops30h 30mSpirit Airlines
Wed 28/506:00SEA - ORD
1 stop26h 55mSpirit Airlines
Deal found 26/3£183
Mon 1/920:10ORD - SEA
1 stop23h 18mSun Country Air
Wed 8/1018:10SEA - ORD
1 stop22h 35mSun Country Air
Deal found 25/3£244

Cheapflights Fare Finder

Customise your flight search to find flights from Chicago 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 27 March 2025.
Use the filters below to find and compare flights from Chicago to Seattle that are best for you.

Fly from

Chicago

Fly to

Seattle

Route

Depart

Return

Price

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 23/4

17:56-20:32

Nonstop4h 36m

Seattle/Tacoma Intl

Sat 26/4

17:58-23:59

Nonstop4h 01m

£131

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sun 31/8

06:24-09:00

Nonstop4h 36m

Seattle/Tacoma Intl

Tue 16/9

17:51-23:59

Nonstop4h 08m

£135

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 16/4

07:00-13:59

1 stop8h 59m

Seattle/Tacoma Intl

Tue 22/4

23:45-05:46

Nonstop4h 01m

£136

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 10/5

18:59-21:42

Nonstop4h 43m

Seattle/Tacoma Intl

Tue 20/5

17:50-23:59

Nonstop4h 09m

£154

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 14/5

09:55-14:25

2 stops30h 30m

Seattle/Tacoma Intl

Wed 28/5

16:19-22:23

Nonstop4h 04m

£156

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 7/6

17:25-23:10

1 stop7h 45m

Seattle/Tacoma Intl

Sat 16/8

08:10-17:55

1 stop7h 45m

£161

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 14/5

09:55-14:25

2 stops30h 30m

Seattle/Tacoma Intl

Wed 28/5

06:00-10:55

1 stop26h 55m

£183

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Mon 1/9

20:10-17:28

1 stop23h 18m

Seattle/Tacoma Intl

Wed 8/10

18:10-18:45

1 stop22h 35m

£244

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Tue 29/4

07:00-13:59

1 stop8h 59m

£70

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 23/7

16:00-23:15

1 stop9h 15m

£73

Flights are sorted by cheapest return flights first.

Deals found on 26/3

Showing 1-10 of 15 results
1
2

Best time to book a flight from Chicago to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Chicago 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 to Seattle

How far ahead should I book a flight from Chicago to Seattle?

Use this chart to determine the optimal time to book a return flight from Chicago to Seattle. Price data was last updated on 21 March 2025.

Booking 62 days in advance of your planned departure date is, on average, the best time to get cheap flights from Chicago to Seattle. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Chicago to Seattle?

Currently, January is the cheapest month in which you can book a flight from Chicago to Seattle (average of £622). Flying from Chicago 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 CHI to SEA?

Find hourly flight availability from Chicago 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 27 March 2025.

When flying from Chicago to Seattle, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 39% versus a flight at midday.

Weekly flight availability from Chicago to Seattle

Explore weekly flight availability from Chicago 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 27 March 2025.

The most flights from CHI to SEA are scheduled on a Wednesday (48 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (14 on average).

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 18.0 - 168.0 inches per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

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 27 March 2025.
Peruse reviews from past customers who have flown with Southwest, Alaska Airlines and Delta from Chicago to Seattle to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very Good
4,273 reviews
Check prices

Overall

8.1

Food

7.1

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.1
Very Good
4,273 reviews
Southwest
8.1
Very Good
4,273 reviews
Check prices

Overall

8.1

Food

7.1

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Alaska Airlines
8.0
Very Good
9,798 reviews
Southwest
8.1
Very Good
4,273 reviews
Check prices

Overall

8.1

Food

7.1

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
8.0
Very Good
7,895 reviews
Southwest
8.1
Very Good
4,273 reviews
Check prices

Overall

8.1

Food

7.1

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Hawaiian Airlines
7.9
Good
2,334 reviews
Southwest
8.1
Very Good
4,273 reviews
Check prices

Overall

8.1

Food

7.1

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,603 reviews
Southwest
8.1
Very Good
4,273 reviews
Check prices

Overall

8.1

Food

7.1

Boarding

8.2

Comfort

8.1

Entertainment

7.6

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Related info for your journey

Find useful and relevant information for your journey from Chicago 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?

    Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly into when you book flights from Chicago to Seattle. 0 airlines have flights to Seattle/Tacoma Intl from Chicago on a regular basis. Booking flights from Chicago to Seattle/Tacoma Intl should not be difficult; the airport handles an average of 30 inbound flights from Chicago per day.

  • What are the cheapest airlines flying from Chicago to Seattle round-trip?

    According to our current data, Hawaiian Airlines (£131), Alaska Airlines (£135), and United Airlines (£136) offers the cheapest pricing from Chicago to Seattle. Hawaiian Airlines is currently priced 41% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Chicago to Seattle one-way?

    £70 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on Southwest and Alaska Airlines, with prices starting from £73 and £81, respectively.

  • What are the most reliable airlines from Chicago to Seattle?

    The top 3 most reliable airlines when flying from Chicago to Seattle are Air France (92%), Brussels Airlines (83%) and Avianca (82%).

  • What are the cheapest flights from Chicago to Seattle?

    While on average a flight from Chicago to Seattle is generally £194, our data shows the cheapest flight currently is £135. When looking at the most popular route, (Chicago O'Hare Intl - Seattle/Tacoma Intl), you can expect to pay £128 for that flight.

  • Can I find deals for flights from Chicago to Seattle that include hotel bookings?

    Yes. In addition to deals on Chicago to Seattle flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Chicago to Seattle?

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

  • Can I find deals for business class flights from Chicago to Seattle?

    Yes. Cheapflights offers flight deals from Chicago 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 to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Chicago to Seattle (average of £622). Flying from Chicago 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?

Book flights to Chicago if you plan to visit one of these locations
Tacoma
Leavenworth
Bothell

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Alternative routes for Chicago to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
O'Hare Intl to Seattle flights

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