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Flights from Chicago to Seattle

Top Airlines Flying from Chicago to Seattle

You can choose from 1 airlines that fly from Chicago to Seattle, including Alaska Airlines, Alaska Airlines offers the lowest prices on this route.
Alaska Airlines logo Alaska Airlines
Airlines are determined based on actual purchased flight tickets from Chicago to Seattle according to previous 12 months data from Trip.com.

Explore the cheapest flights from Chicago to Seattle in the next three months. Based on Trip.com's data from the latest 7 days, one-way direct flights start at PHP 6,419, and round-trip direct tickets start at PHP 13,680.

      • Cheapest nonstop
        ORD 8:20 PM
        4h 44m
        Nonstop
        SEA 11:04 PM
        Chicago - Seattle | Sun, Aug 16 | Alaska Airlines
        SEA 5:48 PM
        4h 11m
        Nonstop
        ORD 11:59 PM
        Seattle - Chicago | Mon, Aug 24 | Alaska Airlines
        PHP 13,680 PHP 18,900
        28% off
        28% off
        PHP 18,900 PHP 13,680
      • ORD 6:42 PM
        4h 52m
        Nonstop
        SEA 9:34 PM
        Chicago - Seattle | Wed, Aug 12 | Alaska Airlines
        SEA 5:35 PM
        3h 54m
        Nonstop
        ORD 11:29 PM
        Seattle - Chicago | Tue, Aug 18 | Delta Air Lines
        PHP 13,805 PHP 18,900
        27% off
        27% off
        PHP 18,900 PHP 13,805
      • ORD 5:56 PM
        4h 39m
        Nonstop
        SEA 8:35 PM
        Chicago - Seattle | Sun, Aug 16 | Delta Air Lines
        SEA 5:48 PM
        4h 11m
        Nonstop
        ORD 11:59 PM
        Seattle - Chicago | Mon, Aug 24 | Alaska Airlines
        PHP 13,886 PHP 18,900
        27% off
        27% off
        PHP 18,900 PHP 13,886
      • ORD 7:00 AM
        4h 37m
        Nonstop
        SEA 9:37 AM
        Chicago - Seattle | Wed, Aug 12 | Delta Air Lines
        SEA 5:35 PM
        3h 54m
        Nonstop
        ORD 11:29 PM
        Seattle - Chicago | Tue, Aug 18 | Delta Air Lines
        PHP 14,154
        25% off
        PHP 18,900 PHP 14,154
      • ORD 7:00 AM
        4h 37m
        Nonstop
        SEA 9:37 AM
        Chicago - Seattle | Mon, Aug 17 | Delta Air Lines
        SEA 5:35 PM
        3h 54m
        Nonstop
        ORD 11:29 PM
        Seattle - Chicago | Mon, Aug 24 | Delta Air Lines
        PHP 14,253
        25% off
        PHP 18,900 PHP 14,253
      • ORD 7:20 AM
        29h 15m
        1 stop
        SEA 10:35 AM
        Chicago - Seattle | Tue, Jun 23 | Frontier Airlines
        SEA 7:41 PM
        23h 2m
        1 stop
        ORD 8:43 PM
        Seattle - Chicago | Mon, Jun 29 | Frontier Airlines
        PHP 13,608
        28% off
        PHP 18,900 PHP 13,608
      • ORD 9:57 PM
        13h 7m
        1 stop
        SEA 9:04 AM
        Chicago - Seattle | Wed, Aug 12 | Frontier Airlines
        SEA 5:35 PM
        3h 54m
        Nonstop
        ORD 11:29 PM
        Seattle - Chicago | Mon, Aug 17 | Delta Air Lines
        PHP 15,148
        20% off
        PHP 18,900 PHP 15,148
      • ORD 7:15 AM
        29h 24m
        1 stop
        SEA 10:39 AM
        Chicago - Seattle | Tue, Jul 14 | Frontier Airlines
        SEA 8:12 PM
        7h 16m
        1 stop
        ORD 5:28 AM
        Seattle - Chicago | Tue, Jul 21 | Frontier Airlines
        PHP 15,220
        19% off
        PHP 18,900 PHP 15,220
      • ORD 7:15 AM
        29h 24m
        1 stop
        SEA 10:39 AM
        Chicago - Seattle | Mon, Jul 13 | Frontier Airlines
        SEA 11:04 AM
        17h 13m
        1 stop
        ORD 6:17 AM
        Seattle - Chicago | Wed, Jul 15 | Frontier Airlines
        PHP 15,309
        19% off
        PHP 18,900 PHP 15,309
      • CHI 1:00 PM
        17h 25m
        1 stop
        SEA 2:00 PM
        Chicago - Seattle | Sun, Jun 21 | Normal Airline
        SEA 3:00 PM
        6h
        Nonstop
        CHI 4:00 PM
        Seattle - Chicago | Tue, Jun 23 | Normal Airline
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      • Cheapest nonstop
        ORD 8:20 PM
        4h 44m
        Nonstop
        SEA 11:04 PM
        Chicago - Seattle | Sat, Aug 15 | Alaska Airlines
        PHP 6,419 PHP 9,826
        35% off
        35% off
        PHP 9,826 PHP 6,419
      • ORD 5:56 PM
        4h 39m
        Nonstop
        SEA 8:35 PM
        Chicago - Seattle | Sat, Aug 15 | Delta Air Lines
        PHP 6,822 PHP 9,826
        31% off
        31% off
        PHP 9,826 PHP 6,822
      • ORD 7:00 AM
        4h 40m
        Nonstop
        SEA 9:40 AM
        Chicago - Seattle | Sat, Aug 8 | United Airlines
        PHP 6,822 PHP 9,826
        31% off
        31% off
        PHP 9,826 PHP 6,822
      • ORD 8:20 PM
        4h 44m
        Nonstop
        SEA 11:04 PM
        Chicago - Seattle | Sat, Aug 8 | Alaska Airlines
        PHP 6,831
        30% off
        PHP 9,826 PHP 6,831
      • ORD 8:20 PM
        4h 44m
        Nonstop
        SEA 11:04 PM
        Chicago - Seattle | Tue, Aug 18 | Alaska Airlines
        PHP 7,127
        27% off
        PHP 9,826 PHP 7,127
      • ORD 8:20 PM
        4h 44m
        Nonstop
        SEA 11:04 PM
        Chicago - Seattle | Sun, Aug 16 | Alaska Airlines
        PHP 7,127
        27% off
        PHP 9,826 PHP 7,127
      • ORD 8:42 PM
        4h 44m
        Nonstop
        SEA 11:26 PM
        Chicago - Seattle | Sat, Jun 20 | Alaska Airlines
        PHP 7,727
        21% off
        PHP 9,826 PHP 7,727
      • ORD 5:56 PM
        4h 39m
        Nonstop
        SEA 8:35 PM
        Chicago - Seattle | Sun, Aug 16 | Delta Air Lines
        PHP 7,959
        19% off
        PHP 9,826 PHP 7,959
      • ORD 9:57 PM
        17h 20m
        1 stop
        SEA 1:17 PM
        Chicago - Seattle | Tue, Aug 18 | Frontier Airlines
        PHP 7,189
        27% off
        PHP 9,826 PHP 7,189
      • CHI 1:00 PM
        17h 25m
        1 stop
        SEA 2:00 PM
        Chicago - Seattle | Sun, Jun 21 | Normal Airline
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Displayed flight fares from Chicago to Seattle are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Flying from Chicago to Seattle

The distance between Chicago and Seattle is approximately 2,785.86 km. It takes around 4 hours 36 minutes on average to fly from Chicago to Seattle. Based on Trip.com's data, travel demand peaks in July. The off-season for travel is October.

Cheapest one-way flight pricePHP 6,419
Cheapest round-trip ticket pricePHP 13,608
Off-season for travelOctober
Peak season for travelJuly
Flight distance2,785.86 km
Average flight time4 hours 36 minutes
Popular airlineAlaska Airlines
Flight statistics for the Chicago–Seattle route are based on aggregated booking data from Trip.com over the past 12 months.

Trip.com Price Insights on Flights from Chicago to Seattle.

What is the cheapest month for one-way flights from Chicago to Seattle?

The average price of one-way flights from Chicago to Seattle purchased by Trip.com users by month over the past 12 months.

Based on Trip.com’s data, the cheapest month for flights from Chicago to Seattle is June, with an average price of PHP 9,709; while the month with the highest flight price is usually January, with an average price of up to PHP 14,168.

PHP 14,168
PHP 11,939
PHP 9,709
PHP 7,480
  • PHP 9,709
    Jun
  • PHP 11,549
    Jul
  • PHP 12,763
    Aug
  • PHP 11,254
    Sep
  • PHP 10,000
    Oct
  • PHP 11,497
    Nov
  • PHP 13,665
    Dec
  • PHP 14,168
    Jan
  • PHP 10,647
    Feb
  • PHP 11,514
    Mar
  • PHP 12,405
    Apr
  • PHP 13,036
    May

What is the cheapest month for round-trip flights from Chicago to Seattle?

The average price of round-trip flights from Chicago to Seattle purchased by Trip.com users by month over the past 12 months.

Based on Trip.com’s data, the cheapest month for round-trip flights from Chicago to Seattle is February, with an average price of PHP 11,867, and the most expensive month is May, with an average price of up to PHP 26,697.

PHP 26,697
PHP 19,282
PHP 11,867
PHP 4,452
    Cheapest
  • PHP 14,636
    Jun
  • PHP 19,479
    Jul
  • PHP 17,375
    Aug
  • PHP 14,646
    Sep
  • PHP 15,531
    Oct
  • PHP 21,442
    Nov
  • PHP 13,743
    Dec
  • PHP 21,227
    Jan
  • PHP 11,867
    Feb
  • PHP 17,355
    Mar
  • PHP 19,398
    Apr
  • PHP 26,697
    May

Which day of the week has the lowest fares for flights from Chicago to Seattle?

The average weekly fares for flights from Chicago to Seattle on different dates. (Based on Trip.com’s data from the past 12 months)

Based on Trip.com’s data from the past 12 months, Tuesday offers the lowest fares for flights from Chicago to Seattle, while Sunday typically has the highest fares.

PHP 13,790
PHP 12,261
PHP 10,732
PHP 9,203
  • PHP 13,535
    Mon
  • PHP 10,732
    Tue
  • PHP 10,972
    Wed
  • PHP 12,057
    Thu
  • PHP 11,244
    Fri
  • PHP 12,062
    Sat
  • PHP 13,790
    Sun

Frequently Asked Questions

  • What are the cheapest flights from Chicago to Seattle (CHI-SEA)?

    Based on Trip.com data, Alaska Airlines offers one-way fares as low as PHP 6,419 on Cheapest nonstop routes (e.g. ORD to SEA on Sat, Aug 15), while Frontier Airlines offers Cheapest nonstop round-trips from PHP 13,608 departing on Tue, Jun 23 and returning on Mon, Jun 29.
  • At the moment, you can catch a nonstop flight from Chicago to Seattle with the following airlines, including: Alaska Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.
  • It takes around 4 hours 36 minutes to fly from Chicago (CHI) to Seattle (SEA).
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Chicago to Seattle is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • Based on Trip.com data in the past 4 weeks, there is 87 flight per week flying from Chicago to Seattle. You can check the weekly schedule for popular airlines on this route below: Alaska Airlines: S/M/T/W/T/F/S -- AS715 (06:07)
  • To find best deals on flights from Chicago to Seattle, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Sat, Aug 15, with one-way flights priced at just PHP 6,419.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Alaska Airlines.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Seattle travel is around July.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Chicago to Seattle is October, when demand for travel is lower.
  • After crunching the numbers on our June flight calendar, it's currently cheapest to fly from Chicago to Seattle on June 19, 2026 with Frontier Airlines, with prices starting at PHP 7,574.
  • You can land at any one of the following hubs in Seattle, with Chicago O'Hare International Airport to Seattle-Tacoma International Airport (ORD-SEA) is by far the most common option on this route: King County (Boeing Field) International Airport (BFI) Kenmore Air Harbor Seaplane Base (LKE) Seattle-Tacoma International Airport (SEA).
  • The time difference between Seattle and Chicago is 2h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

Trip.com Airline Insights on Flights from Chicago to Seattle

Which airline offers the cheapest direct flights from Chicago to Seattle?

The average fare for all direct flights from Chicago to Seattle. (Based on Trip.com’s data from the past 12 months)

Based on Trip.com’s data from the past 12 months, Delta Air Lines offers the cheapest direct flights from Chicago to Seattle, with prices starting from PHP 11,513.

PHP 9,753
PHP 11,513
PHP 13,274
PHP 15,035
PHP 16,795
Delta Air Lines
PHP 11,513
Delta Air Lines
Hawaiian Airlines
PHP 11,746
Hawaiian Airlines
Alaska Airlines
PHP 12,167
Alaska Airlines
American Airlines
PHP 14,369
American Airlines
United Airlines
PHP 16,795
United Airlines

Which airline operates the most frequent flights from Chicago to Seattle?

Total number of flights from Chicago to Seattle operated by all airlines. (Based on Trip.com data from the past month)

Based on Trip.com’s data from the past month, Alaska Airlines/Qatar Airways operates the most frequent flights from Chicago to Seattle, with 46 flights per week.

12
23
35
46
Alaska Airlines
46
Alaska Airlines
Qatar Airways
46
Qatar Airways
United Airlines
45
United Airlines
American Airlines
37
American Airlines
Iberia
33
Iberia
Delta Air Lines
23
Delta Air Lines

How many flights operate daily from Chicago to Seattle?

The number of weekly flights operating on each date from Chicago to Seattle. (Based on Trip.com’s data from the past month)

Based on Trip.com’s data from the past month, Friday is the day with the most flights from Chicago to Seattle, while Thursday has the fewest.

298
254
209
165
Highest
227
Mon
236
Tue
210
Wed
209
Thu
298
Fri
289
Sat
267
Sun

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Note: Prices shown on this page are the lowest estimated prices found in the last 24 hours and include all taxes and fees.

Book with no extra fees

Prices displayed on this page are all-inclusive (incl. taxes, fuel surcharges, Civil Aviation Development Fund, etc.), and all fees are clearly shown before payment. Charges for checked baggage, onboard meals, Wi-Fi, and other optional services may also appear in the flight cards where applicable.

Real-time pricing updates

Prices, availability, and travel information on this page have been updated within the last 24 hours, and for many routes the data may refresh in real time. The more popular the route, the more accurate and up-to-date the data.

Change & Cancellation Policy

Trip.com shows the change and cancellation rules for each ticket during the booking process, including all related fees and conditions. Please refer to the following scenarios:
Voluntary cancellation/change:
To request a change or cancellation, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and flight segment, and submit your request. Please note that additional charges may apply based on the airline’s fare rules.
Cancellation/change due to a flight schedule change:
If your flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For full details of change and cancellation policies, please refer to the customer support pages.