This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/3. Fares are subject to change and may not be available on all flights or dates of travel.
CHI — SEA
10 Oct — 17 Oct1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Chicago to Seattle/Tacoma Intl are usually found in January or February, booked 39 days in advance, depart on a Tuesday or Wednesday and return on a Monday
Cheap flight deals from Chicago to Seattle
Enter your travel dates to find the best prices.
Cheapest
Best
Direct
Last-minute
One-way
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 10 September 2026.
Sat 24/1007:00 -
Nonstop4h 42m
Sat 31/1016:27 -
1 stop5h 54m
Deal found 9/9£204
Thu 15/1019:16 -
Nonstop4h 43m
Sun 18/1020:07 -
1 stop15h 18m
Deal found 7/9£207
Thu 5/1107:20 -
1 stop17h 37m
Sun 8/1123:42 -
Nonstop3h 58m
Deal found 6/9£208
Thu 19/1114:15 -
1 stop10h 42m
Thu 26/1111:40 -
Nonstop4h 16m
Deal found 6/9£211
Mon 28/920:09 -
Nonstop4h 44m
Thu 1/1017:07 -
Nonstop4h 03m
Deal found 6/9£212
Fri 30/1014:03 -
1 stop6h 59m
Thu 5/1121:35 -
1 stop24h 15m
Deal found 7/9£214
Fri 9/1019:49 -
1 stop15h 39m
Sun 11/1023:41 -
Nonstop3h 59m
Deal found 6/9£215
Sat 3/1007:20 -
1 stop16h 13m
Sun 11/1023:41 -
Nonstop3h 59m
Deal found 5/9£217
Fri 30/1014:03 -
1 stop10h 02m
Fri 6/1121:35 -
2 stops15h 01m
Deal found 7/9£218
Sun 13/1206:00 -
Nonstop4h 39m
Sun 13/1211:41 -
1 stop10h 18m
Deal found 7/9£218
Wed 25/1107:26 -
1 stop9h 58m
Fri 11/1213:45 -
Nonstop4h 10m
Deal found 5/9£219
Sat 12/1206:00 -
Nonstop4h 39m
Sat 12/1211:31 -
2 stops10h 28m
Deal found 7/9£220
Best flights from Chicago to Seattle
Discover carefully curated flight deals from Chicago to Seattle that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 10 September 2026.
Fri 9/1019:16 -
Nonstop4h 43m
Sun 11/1021:08 -
1 stop14h 17m
Deal found 6/9£207
Tue 29/916:05 -
Nonstop4h 47m
Wed 7/1017:07 -
Nonstop4h 03m
Deal found 6/9£212
Sat 10/1006:35 -
Nonstop4h 45m
Sat 24/1017:50 -
Nonstop4h 04m
Deal found 9/9£234
Thu 15/1015:49 -
Nonstop4h 39m
Tue 20/1020:35 -
1 stop14h 50m
Deal found 8/9£238
Fri 11/1207:45 -
1 stop9h 30m
Sat 26/1217:52 -
Nonstop4h 07m
Deal found 5/9£246
Thu 3/1208:00 -
Nonstop4h 41m
Sat 5/1207:00 -
1 stop9h 55m
Deal found 9/9£241
Fri 11/1214:04 -
1 stop6h 49m
Mon 21/1217:52 -
Nonstop4h 07m
Deal found 5/9£246
Wed 30/908:00 -
Nonstop4h 34m
Tue 6/1007:04 -
1 stop9h 49m
Deal found 8/9£241
Sat 21/1112:00 -
Nonstop4h 33m
Thu 26/1108:25 -
1 stop8h 40m
Deal found 7/9£246
Tue 6/1017:46 -
Nonstop4h 42m
Tue 13/1020:35 -
1 stop14h 50m
Deal found 9/9£241
Fri 27/1106:00 -
Nonstop4h 41m
Thu 3/1217:54 -
Nonstop4h 05m
Deal found 8/9£242
Wed 21/1015:49 -
Nonstop4h 39m
Fri 23/1021:08 -
1 stop14h 17m
Deal found 9/9£244
Direct flights from Chicago to Seattle
Explore direct flight options from Chicago to Seattle based on user searches, and compare prices and availability for your desired travel dates. Data last updated 10 September 2026.
Mon 28/920:09 -
Nonstop4h 44m
Fri 2/1017:07 -
Nonstop4h 03m
Deal found 6/9£212
Sat 24/1015:49 -
Nonstop4h 39m
Sat 31/1008:32 -
Nonstop4h 21m
Deal found 9/9£217
Thu 19/1107:00 -
Nonstop4h 50m
Sun 22/1123:58 -
Nonstop3h 58m
Deal found 8/9£219
Mon 12/1020:09 -
Nonstop4h 44m
Tue 13/1017:07 -
Nonstop4h 03m
Deal found 6/9£223
Tue 15/1219:45 -
Nonstop4h 48m
Thu 17/1223:44 -
Nonstop4h 15m
Deal found 7/9£224
Tue 29/915:52 -
Nonstop4h 33m
Sat 3/1023:41 -
Nonstop3h 59m
Deal found 7/9£227
Mon 12/1020:09 -
Nonstop4h 44m
Sat 17/1017:07 -
Nonstop4h 03m
Deal found 6/9£227
Tue 29/906:00 -
Nonstop4h 30m
Tue 29/911:35 -
Nonstop4h 26m
Deal found 8/9£230
Wed 9/1220:42 -
Nonstop4h 44m
Wed 16/1200:36 -
Nonstop4h 04m
Deal found 7/9£231
Fri 23/1009:00 -
Nonstop4h 44m
Fri 30/1010:33 -
Nonstop4h 17m
Deal found 8/9£233
Mon 26/1019:16 -
Nonstop4h 43m
Tue 3/1117:51 -
Nonstop4h 08m
Deal found 8/9£234
Thu 1/1017:44 -
Nonstop4h 36m
Wed 7/1017:30 -
Nonstop4h 04m
Deal found 9/9£235
Last-minute flights from Chicago to Seattle
Discover last-minute flight deals from Chicago to Seattle. Data last updated 10 September 2026 and is based on user searches.
Mon 28/907:00 -
Nonstop4h 36m
Thu 1/1017:07 -
Nonstop4h 03m
Deal found 7/9£212
Tue 29/916:20 -
1 stop6h 55m
Wed 7/1017:07 -
Nonstop4h 03m
Deal found 6/9£219
Tue 29/907:20 -
1 stop9h 19m
Mon 5/1023:41 -
Nonstop3h 59m
Deal found 5/9£225
Wed 30/907:20 -
1 stop9h 19m
Wed 30/917:51 -
Nonstop4h 08m
Deal found 8/9£224
Sat 3/1007:20 -
1 stop16h 13m
Sun 11/1023:41 -
Nonstop3h 59m
Deal found 5/9£217
Thu 8/1019:49 -
1 stop15h 39m
Sun 11/1023:41 -
Nonstop3h 59m
Deal found 5/9£227
Fri 9/1019:49 -
1 stop15h 39m
Sun 11/1023:41 -
Nonstop3h 59m
Deal found 6/9£215
Thu 15/1019:16 -
Nonstop4h 43m
Sun 18/1020:07 -
1 stop15h 18m
Deal found 7/9£207
Sat 24/1007:00 -
Nonstop4h 42m
Sat 31/1016:27 -
1 stop5h 54m
Deal found 9/9£204
Fri 30/1014:03 -
1 stop6h 59m
Thu 5/1121:35 -
1 stop24h 15m
Deal found 7/9£214
Fri 30/1014:03 -
1 stop10h 02m
Fri 6/1121:35 -
2 stops15h 01m
Deal found 7/9£218
One-way flights from Chicago to Seattle
Search for one-way flight options from Chicago to Seattle. Find affordable one-way fares based on user searches. Data last updated 10 September 2026.
Sat 6/306:00 -
Nonstop4h 39m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 6/9£110
Sat 3/1010:32 -
2 stops12h 43m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 7/9£117
Wed 30/912:55 -
1 stop9h 42m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 8/9£121
Sat 10/1014:30 -
1 stop8h 45m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 9/9£125
Fri 6/1112:50 -
Nonstop4h 35m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 9/9£125
Fri 6/1113:30 -
1 stop9h 26m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 9/9£129
Wed 30/906:00 -
Nonstop4h 30m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 6/9£132
Wed 16/906:30 -
1 stop10h 38m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 9/9£134
Mon 8/313:30 -
1 stop8h 40m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 9/9£136
Sat 26/920:12 -
Nonstop4h 44m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 5/9£139
Wed 21/1007:20 -
2 stops12h 13m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 9/9£145
Find 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 10 September 2026.
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 7,457,451 searches. Data last updated 10 September 2026.
Use the filters below to find and compare flights from Chicago to Seattle that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
Cheapest return flight
ChicagoSeattle
ORD Chicago O'Hare Intl - SEA Seattle/Tacoma Intl
ORDSEA
Chicago O'Hare Intl
Sat 3/10
10:32-21:15
2 stops12h 43m
Seattle/Tacoma Intl
Wed 31/12
00:00-02:00
Nonstop0h 00m
£117
Fastest return journey
ChicagoSeattle
ORD Chicago O'Hare Intl - SEA Seattle/Tacoma Intl
ORDSEA
Chicago O'Hare Intl
Wed 11/11
18:35-21:29
Nonstop4h 54m
Seattle/Tacoma Intl
Wed 31/12
00:00-02:00
Nonstop0h 00m
£117
ChicagoSeattle
ORD Chicago O'Hare Intl - SEA Seattle/Tacoma Intl
ORDSEA
Chicago O'Hare Intl
Thu 17/12
06:00-09:00
Nonstop5h 00m
Seattle/Tacoma Intl
Wed 31/12
00:00-02:00
Nonstop0h 00m
£117
ChicagoSeattle
ORD Chicago O'Hare Intl - SEA Seattle/Tacoma Intl
ORDSEA
Chicago O'Hare Intl
Tue 19/1
12:55-20:10
1 stop9h 15m
Seattle/Tacoma Intl
Wed 31/12
00:00-02:00
Nonstop0h 00m
£121
ChicagoSeattle
ORD Chicago O'Hare Intl - SEA Seattle/Tacoma Intl
ORDSEA
Chicago O'Hare Intl
Wed 30/9
12:55-20:37
1 stop9h 42m
Seattle/Tacoma Intl
Wed 31/12
00:00-02:00
Nonstop0h 00m
£121
ChicagoSeattle
ORD Chicago O'Hare Intl - SEA Seattle/Tacoma Intl
ORDSEA
Chicago O'Hare Intl
Wed 21/10
07:20-17:33
2 stops12h 13m
Seattle/Tacoma Intl
Wed 31/12
00:00-02:00
Nonstop0h 00m
£148
ChicagoSeattle
ORD Chicago O'Hare Intl - SEA Seattle/Tacoma Intl
ORDSEA
Chicago O'Hare Intl
Wed 14/10
07:20-17:33
2 stops12h 13m
Seattle/Tacoma Intl
Wed 31/12
00:00-02:00
Nonstop0h 00m
£148
ChicagoSeattle
ORD Chicago O'Hare Intl - SEA Seattle/Tacoma Intl
ORDSEA
Chicago O'Hare Intl
Wed 7/10
07:20-16:04
2 stops10h 44m
Seattle/Tacoma Intl
Wed 31/12
00:00-02:00
Nonstop0h 00m
£148
ChicagoSeattle
ORD Chicago O'Hare Intl - SEA Seattle/Tacoma Intl
ORDSEA
Chicago O'Hare Intl
Mon 5/10
07:20-17:33
2 stops12h 13m
Seattle/Tacoma Intl
Wed 31/12
00:00-02:00
Nonstop0h 00m
£162
ChicagoSeattle
ORD Chicago O'Hare Intl - SEA Seattle/Tacoma Intl
ORDSEA
Chicago O'Hare Intl
Fri 9/10
19:16-21:59
Nonstop4h 43m
Seattle/Tacoma Intl
Sun 11/10
21:08-13:25
1 stop14h 17m
£207
Flights are sorted by cheapest return flights first.
Deals found on 7/9
Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3
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.
CHI-SEA
ORD-SEA
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
CHI-SEA
ORD-SEA
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 £165). Flying from Chicago to Seattle in July is currently the most expensive (average of £304). 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 10 September 2026.
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 evening, which can drop the price by up to 29% versus a flight in the afternoon.
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 10 September 2026.
The most flights from CHI to SEA are scheduled on a Tuesday (52 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (14 on average).
How much does it cost for a return flight from Chicago to Seattle?
Airfare is below average for this route at the moment.
Chicago to Seattle flights typically cost between £235 and £327 in October.The cheapest return price found within the last 5 days was £204 on Multiple Airlines (24 Oct–31 Oct).
How far ahead should I book a flight from Chicago to Seattle?
Booking 34 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.
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 24 inbound flights from Chicago per day.
How long is the flight from Chicago to Seattle?
Departing from Chicago to Seattle will take you 4h 34m. The distance between Chicago and Seattle is about 1715 mi. Generally, flights for this route are direct.
What are the most reliable airlines from Chicago to Seattle?
The top 3 most reliable airlines when flying from Chicago to Seattle are Qatar Airways (69%), American Airlines (67%) and Royal Jordanian (67%).
What are the cheapest flights from Chicago to Seattle?
While on average a flight from Chicago to Seattle is generally £402, our data shows the cheapest flight currently is £302. When looking at the most popular route, (Chicago O'Hare Intl - Seattle/Tacoma Intl), you can expect to pay £160 for that flight.
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 £165). Flying from Chicago to Seattle in July is currently the most expensive (average of £304). 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.
Browse through other flights departing from Chicago. Flights are based on user searches made on Cheapflights and were last updated on 10 September 2026.
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 10 September 2026.
Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Chicago to Seattle?
900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Seattle from Chicago today with Cheapflights!
Why should you use Cheapflights to find cheap flight tickets from Chicago to Seattle?
Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Chicago to Seattle for you. Better yet — we are completely free to use.
Can Cheapflights find flights from Chicago to Seattle with no change fees?
Yes, we can. To see specific flights from Chicago to Seattle with no change fees, users can toggle flexible booking options after using the search form above to find flights.
Can Cheapflights notify me if prices for flights from Chicago to Seattle become cheaper?
Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
We value your privacy
Cheapflights and its partners wish to use cookies or similar technologies to store and/or access information on and about your device and process personal data such as your IP address, device identifiers etc., in order to improve your experience on the site, to analyse navigation, to offer and measure personalised advertising, and to facilitate sharing on social networks. We also allow the use of third-party cookies (including those from our advertising partners) on our sites.
By clicking 'Accept', you consent to your data being processed by 0 vendors on this web site for the purposes described in this notice. You can review the vendors and their individual processing purposes on the .
To review individual processing purposes and cookie categories, please click ’Select individual purposes’. You can review your choices and withdraw your consent at any time by clicking the ’Privacy Preferences’ link in the page side navigation.