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Cheap flights from Chicago to Seattle from £76

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 27/2. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — SEA
29 Jan — 5 Feb1
1 adult

The best prices from Chicago to Seattle/Tacoma Intl are usually found in February or September, booked 29 days in advance, depart on a Tuesday or Monday and return on a Wednesday

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 24 January 2025.

Round-trip from

£144

One-way from

£76

Popular in

July

Cheapest in

February

Average price

£213

Good round-trip deal

£129 or less
Delta
  • Delta
  • 19/2-21/2
  • Nonstop
  • 8h 59m total
  • Chicago to Seattle
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Delta
  • Delta
  • 27/2
  • Nonstop
  • 4h 46m total
  • Chicago to Seattle
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Highest demand for flights based on searches. 19% potential increase in price (£45 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 January 2025
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Price to beat on a round-trip 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 24 January 2025.

Wed 19/207:00ORD - SEA
Nonstop4h 58mDelta
Fri 21/217:55SEA - ORD
Nonstop4h 01mDelta
Deal found 22/1£144
Sat 15/217:56ORD - SEA
Nonstop4h 41mAlaska Airlines
Mon 17/223:59SEA - ORD
Nonstop3h 54mAlaska Airlines
Deal found 23/1£153
Wed 9/407:00ORD - SEA
1 stop8h 59mUnited Airlines
Sat 19/414:18SEA - ORD
Nonstop4h 07mUnited Airlines
Deal found 23/1£155
Sat 15/219:05ORD - SEA
1 stop6h 40mSouthwest
Sat 22/205:15SEA - ORD
1 stop11h 15mSouthwest
Deal found 23/1£167
Fri 21/213:32ORD - SEA
1 stop12h 53mSpirit Airlines
Sat 22/205:15SEA - ORD
1 stop14h 35mSpirit Airlines
Deal found 22/1£170
Fri 21/207:45ORD - SEA
Nonstop4h 43mMultiple Airlines
Mon 24/215:16SEA - ORD
1 stop7h 28mMultiple Airlines
Deal found 22/1£175
Fri 21/206:50ORD - SEA
1 stop7h 46mFrontier
Fri 21/215:16SEA - ORD
1 stop7h 28mFrontier
Deal found 22/1£200
Thu 29/520:05ORD - SEA
1 stop28h 46mSun Country Air
Sun 1/623:59SEA - ORD
1 stop17h 10mSun Country Air
Deal found 23/1£247
Wed 26/320:25ORD - SEA
Nonstop4h 42mAmerican Airlines
Sun 30/323:59SEA - ORD
Nonstop4h 00mAmerican Airlines
Deal found 23/1£272

Find flights from Chicago to Seattle within your budget

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 24 January 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 19/2

07:00-09:58

Nonstop4h 58m

Seattle/Tacoma Intl

Fri 21/2

17:55-23:56

Nonstop4h 01m

£144

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 15/2

17:56-20:37

Nonstop4h 41m

Seattle/Tacoma Intl

Mon 17/2

23:59-05:53

Nonstop3h 54m

£153

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 9/4

07:00-13:59

1 stop8h 59m

Seattle/Tacoma Intl

Sat 19/4

14:18-20:25

Nonstop4h 07m

£155

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Sat 15/2

19:05-23:45

1 stop6h 40m

Seattle/Tacoma Intl

Sat 22/2

05:15-18:30

1 stop11h 15m

£167

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Fri 21/2

13:32-00:25

1 stop12h 53m

Seattle/Tacoma Intl

Sat 22/2

05:15-21:50

1 stop14h 35m

£170

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Fri 21/2

07:45-10:28

Nonstop4h 43m

Seattle/Tacoma Intl

Mon 24/2

15:16-00:44

1 stop7h 28m

£175

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Fri 21/2

06:50-12:36

1 stop7h 46m

Seattle/Tacoma Intl

Fri 21/2

15:16-00:44

1 stop7h 28m

£200

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Thu 29/5

20:05-22:51

1 stop28h 46m

Seattle/Tacoma Intl

Sun 1/6

23:59-19:09

1 stop17h 10m

£247

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Wed 26/3

20:25-23:07

Nonstop4h 42m

Seattle/Tacoma Intl

Sun 30/3

23:59-05:59

Nonstop4h 00m

£272

ChicagoSeattle

ORD - SEA

ORDSEA

Chicago O'Hare Intl

Thu 27/2

14:10-16:56

Nonstop4h 46m

£76

Flights are sorted by cheapest return flights first.

Deals found on 22/1

Showing 1-10 of 14 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.

Travel insights for flights from Chicago to Seattle

Get recent, data-driven insights about flights from Chicago to Seattle including ideal travel times, pricing trends, and more.

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 17 January 2025.

Booking 29 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 24 January 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 morning, which can drop the price by up to 18% 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 24 January 2025.

The most flights from CHI to SEA are scheduled on a Monday (27 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (5 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 24 January 2025.
Peruse reviews from past customers who have flown with Delta, American Airlines and United Airlines 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
4,631 reviews
Check prices

Crew

8.7

Comfort

8.1

Food

7.2

Overall

8.1

Entertainment

7.7

Boarding

8.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very Good
4,631 reviews
Southwest
8.1
Very Good
4,631 reviews
Check prices

Crew

8.7

Comfort

8.1

Food

7.2

Overall

8.1

Entertainment

7.7

Boarding

8.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very Good
9,701 reviews
Southwest
8.1
Very Good
4,631 reviews
Check prices

Crew

8.7

Comfort

8.1

Food

7.2

Overall

8.1

Entertainment

7.7

Boarding

8.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very Good
8,502 reviews
Southwest
8.1
Very Good
4,631 reviews
Check prices

Crew

8.7

Comfort

8.1

Food

7.2

Overall

8.1

Entertainment

7.7

Boarding

8.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
8,963 reviews
Southwest
8.1
Very Good
4,631 reviews
Check prices

Crew

8.7

Comfort

8.1

Food

7.2

Overall

8.1

Entertainment

7.7

Boarding

8.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very Good
4,631 reviews
Check prices

Crew

8.7

Comfort

8.1

Food

7.2

Overall

8.1

Entertainment

7.7

Boarding

8.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

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 20 inbound flights from Chicago per day.

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

    According to our current data, Delta (£144), Alaska Airlines (£153), and United Airlines (£155) offers the cheapest pricing from Chicago to Seattle. Delta is currently priced 37% below the average price you’ll pay for this route.

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

    £76 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on United Airlines and Alaska Airlines, with prices starting from £77 and £85, respectively.

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

    The top 3 most reliable airlines when flying from Chicago to Seattle are United Airlines (87%), KLM (85%) and Korean Air (84%).

  • What are the cheapest flights from Chicago to Seattle?

    While on average a flight from Chicago to Seattle is generally £420, our data shows the cheapest flight currently is £129. When looking at the most popular route, (Chicago O'Hare Intl - Seattle/Tacoma Intl), you can expect to pay £110 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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