Alaska's Premium Class offers extra legroom and free cocktails, enhancing comfort on medium-haul flights.
Alaska Airlines Wi-Fi is a flat fee, ideal for business travelers needing connectivity during flights.
$85+ Cheap flights from Seattle (SEA) to Chicago (CHI)
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 7/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — CHI
Mar 26 — Apr 21
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Seattle to Chicago with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Chicago are usually found in January or September, booked 53 days in advance, depart on a Wednesday or Thursday and return on a Wednesday
Cheap flight deals from Seattle to Chicago
Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Chicago (CHI). 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 March 21, 2025.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $165 (CheapOair) |
One-way from | $85 (Delta) |
Popular in | December |
Cheapest in | January |
Average price | $308 |
Good round-trip deal | $300 or less |
Good one-way deal | $170 or less |
Find flight deals from Seattle to Chicago
Cheapest flights from Seattle to ChicagoExplore the most affordable flight options available from Seattle to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 21, 2025.
Explore the most affordable flight options available from Seattle to Chicago. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 21, 2025.
This CheapOair deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/3012:30 pmSEA - ORD
1 stop16h 03mSpirit Airlines
Mon 5/53:08 pmORD - SEA
1 stop22h 27mSpirit Airlines
Deal found 3/20![Spirit Airlines logo]()
$165
This Trip.com deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/96:02 pmSEA - ORD
Nonstop3h 57mMultiple Airlines
Wed 4/167:40 amORD - SEA
Nonstop4h 36mMultiple Airlines
Deal found 3/19![Multiple Airlines logo]()
$166
This Delta deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/1911:35 amSEA - ORD
Nonstop4h 08mDelta
Sat 4/267:50 amORD - SEA
Nonstop4h 44mDelta
Deal found 3/21![Delta logo]()
$169
This United Airlines deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/232:18 pmSEA - ORD
Nonstop4h 07mUnited Airlines
Tue 4/297:00 amORD - SEA
1 stop8h 59mUnited Airlines
Deal found 3/20![United Airlines logo]()
$175
This Hawaiian Airlines deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/2011:36 pmSEA - ORD
Nonstop4h 04mHawaiian Airlines
Fri 4/255:56 pmORD - SEA
Nonstop4h 36mHawaiian Airlines
Deal found 3/20![Hawaiian Airlines logo]()
$204
This Alaska Airlines deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1111:55 pmSEA - ORD
Nonstop4h 04mAlaska Airlines
Tue 4/229:00 amORD - SEA
Nonstop4h 32mAlaska Airlines
Deal found 3/20![Alaska Airlines logo]()
$209
This Southwest deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/46:00 amSEA - MDW
Nonstop4h 10mSouthwest
Wed 6/119:30 pmMDW - SEA
Nonstop4h 35mSouthwest
Deal found 3/20![Southwest logo]()
$209
This American Airlines deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/76:20 amSEA - ORD
Nonstop4h 13mAmerican Airlines
Mon 5/128:23 pmORD - SEA
Nonstop4h 46mAmerican Airlines
Deal found 3/21![American Airlines logo]()
$253
This Frontier deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/1612:21 pmSEA - ORD
1 stop9h 20mFrontier
Mon 5/198:40 amORD - SEA
1 stop9h 54mFrontier
Deal found 3/21![Frontier logo]()
$298
This Frontier deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/16:00 amSEA - MDW
1 stop11h 08mFrontier
Mon 5/58:03 pmMDW - SEA
1 stop6h 41mFrontier
Deal found 3/21![Frontier logo]()
$298
This Sun Country Air deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/216:33 pmSEA - ORD
1 stop20h 48mSun Country Air
Mon 5/269:05 pmORD - SEA
1 stop14h 10mSun Country Air
Deal found 3/20![Sun Country Air logo]()
$305
This Mytrip deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/86:00 amSEA - RFD
1 stop12h 46mMultiple Airlines
Sun 5/119:36 pmRFD - SEA
1 stop28h 34mMultiple Airlines
Deal found 3/20![Multiple Airlines logo]()
$319
Cheapflights Fare Finder
Customize your flight search to find flights from Seattle to Chicago 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 2,558,603 searches. Data last updated March 21, 2025.
Use the filters below to find and compare flights from Seattle to Chicago that are best for you.
Fly from
Seattle
Fly to
Chicago
Route
Depart
Return
Price
SeattleChicago
SEA - ORD
SEAORD
Seattle/Tacoma Intl
Wed 4/30
12:30 pm-6:33 am
1 stop16h 03m
Chicago O'Hare Intl
Mon 5/5
3:08 pm-11:35 am
1 stop22h 27m
$165
SeattleChicago
SEA - ORD
SEAORD
Seattle/Tacoma Intl
Wed 4/9
6:02 pm-11:59 pm
Nonstop3h 57m
Chicago O'Hare Intl
Wed 4/16
7:40 am-10:16 am
Nonstop4h 36m
$166
SeattleChicago
SEA - ORD
SEAORD
Seattle/Tacoma Intl
Sat 4/19
5:55 pm-11:59 pm
Nonstop4h 04m
Chicago O'Hare Intl
Sat 4/26
7:50 am-10:34 am
Nonstop4h 44m
$169
SeattleChicago
SEA - ORD
SEAORD
Seattle/Tacoma Intl
Wed 4/23
2:18 pm-8:25 pm
Nonstop4h 07m
Chicago O'Hare Intl
Tue 4/29
7:00 am-1:59 pm
1 stop8h 59m
$175
SeattleChicago
SEA - ORD
SEAORD
Seattle/Tacoma Intl
Sun 4/20
11:36 pm-5:40 am
Nonstop4h 04m
Chicago O'Hare Intl
Tue 4/22
6:58 pm-8:05 am
1 stop15h 07m
$204
SeattleChicago
SEA - MDW
SEAMDW
Seattle/Tacoma Intl
Wed 6/4
6:00 am-12:10 pm
Nonstop4h 10m
Chicago Midway
Wed 6/11
9:30 pm-12:05 am
Nonstop4h 35m
$209
SeattleChicago
SEA - ORD
SEAORD
Seattle/Tacoma Intl
Thu 4/10
11:36 pm-5:40 am
Nonstop4h 04m
Chicago O'Hare Intl
Mon 4/14
7:00 am-9:36 am
Nonstop4h 36m
$239
SeattleChicago
SEA - ORD
SEAORD
Seattle/Tacoma Intl
Wed 5/7
6:20 am-12:33 pm
Nonstop4h 13m
Chicago O'Hare Intl
Mon 5/12
8:23 pm-11:09 pm
Nonstop4h 46m
$253
SeattleChicago
SEA - ORD
SEAORD
Seattle/Tacoma Intl
Fri 5/16
12:21 pm-11:41 pm
1 stop9h 20m
Chicago O'Hare Intl
Mon 5/19
8:40 am-4:34 pm
1 stop9h 54m
$298
SeattleChicago
SEA - MDW
SEAMDW
Seattle/Tacoma Intl
Thu 5/1
6:00 am-7:08 pm
1 stop11h 08m
Chicago Midway
Sun 5/4
8:03 pm-12:44 am
1 stop6h 41m
$298
Showing 1-10 of 28 results
Compare providers for flights from Seattle to Chicago
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Chicago in March.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Seattle-Chicago flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Chicago flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Chicago flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Seattle-Chicago flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Chicago flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
The best insider tips for Seattle to Chicago flights
Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Seattle to Chicago trip
Airlines
![Alaska Airlines]()
Alaska Airlines
![United Airlines]()
United Airlines
United's Economy Plus offers extra legroom, enhancing comfort on domestic routes.
United's Polaris Lounges provide exclusive amenities for premium passengers, enhancing the travel experience.
![Southwest]()
Southwest
Southwest offers two free checked bags, a generous policy for domestic travelers.
Southwest's Early Bird check-in ensures priority boarding, ideal for securing preferred seats.
Airports
Our travel experts
Best time to book a flight from Seattle to Chicago
Have a flexible travel schedule? Discover the best time to fly to Chicago from Seattle with our price prediction graph.
Estimated round-trip 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 Seattle to Chicago
How far ahead should I book a flight from Seattle to Chicago?
Use this chart to determine the optimal time to book a round-trip flight from Seattle to Chicago. Price data was last updated on March 14, 2025.
The price you pay for your flight from Seattle to Chicago may vary depending on when you book. For the best chance of a lower fare, look to book 53 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Seattle to Chicago?
Currently, August is the cheapest month in which you can book a flight from Seattle to Chicago (average of $245). Flying from Seattle to Chicago in March is currently the most expensive (average of $326). 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 SEA to CHI?
Find hourly flight availability from Seattle to Chicago. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 21, 2025.
It’s typically best to fly out from Seattle to Chicago in the afternoon. Doing so could potentially save you 42% on the flight price compared to flying in the morning, which is usually more expensive.
What is the cheapest day to fly from Seattle to Chicago?
Use this chart to determine the cheapest time to fly round-trip from Seattle to Chicago. Price data was last updated on March 16, 2025.
Travelers seeking maximum savings on their Seattle to Chicago flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from Seattle to Chicago
Explore weekly flight availability from Seattle to Chicago. 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 March 21, 2025.
The most flights from SEA to CHI are scheduled on a Thursday (45 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (17 on average).
Rainfall in Chicago by month
Plan your trip to Chicago by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Chicago ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Chicago when rainfall is around 1.7 in.
Temperature in Chicago by month
Plan your trip to Chicago by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Chicago, 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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).
Reviews of airlines servicing Chicago
Get insights into the airlines that provide service to Chicago. 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 Chicago. Reviews last updated March 21, 2025.
Read through reviews of airlines operating flights from Seattle to Chicago, such as Southwest, Alaska Airlines and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.6
Food
7.1
Boarding
8.2
Comfort
8.1
Crew
8.7
Overall
8.1
Reviews
1 / 20
8.0
ExcellentIla,Mar 2025
HOU - DAL
Entertainment
7.6
Food
7.1
Boarding
8.2
Comfort
8.1
Crew
8.7
Overall
8.1
Reviews
1 / 20
8.0
ExcellentIla,Mar 2025
HOU - DAL
Entertainment
7.6
Food
7.1
Boarding
8.2
Comfort
8.1
Crew
8.7
Overall
8.1
Reviews
1 / 20
8.0
ExcellentIla,Mar 2025
HOU - DAL
Entertainment
7.6
Food
7.1
Boarding
8.2
Comfort
8.1
Crew
8.7
Overall
8.1
Reviews
1 / 20
8.0
ExcellentIla,Mar 2025
HOU - DAL
Entertainment
7.6
Food
7.1
Boarding
8.2
Comfort
8.1
Crew
8.7
Overall
8.1
Reviews
1 / 20
8.0
ExcellentIla,Mar 2025
HOU - DAL
Entertainment
7.6
Food
7.1
Boarding
8.2
Comfort
8.1
Crew
8.7
Overall
8.1
Reviews
1 / 20
8.0
ExcellentIla,Mar 2025
HOU - DAL
Related info for your journey
Find useful and relevant information for your journey from Seattle to Chicago. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locationsMerrillville
New Buffalo
Hammond
Benton Harbor
Porter
Lansing
Valparaiso
Chesterton
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for Seattle to Chicago
See prices for flight routes from nearby airports that may be better suited for you.
Top 8 airlines flying from Seattle to Chicago
Discover the top 8 airlines that operate flights from Seattle to Chicago. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 21, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$106 | Average$445 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$107 | Average$235 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$134 | Average$278 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$138 | Average$242 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$154 | Average$331 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$155 | Average$326 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$156 | Average$357 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$188 | Average$404 | FlexibilityNo cancel fee | On-time63% |