Cheap flights from Seattle to Chicago from C$ 75
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Chicago departing on 6/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names, great deals
Big names, great deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Early arrival? Instantly customize your resultsTrusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Seattle to Chicago
Cheap round-trip flights
Cheap one-way flights
Cheap last-minute flights
Cheap direct flights
Alaska Airlines flights from Seattle to Chicago
Our best Alaska Airlines deals on Seattle to Chicago flight tickets
Southwest flights from Seattle to Chicago
Our best Southwest deals on Seattle to Chicago flight tickets
See travel insights to Chicago from
How to get the cheapest flight ticket from Seattle to Chicago
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Chicago?
The month of September is another great option to travel to Chicago, with average flight prices from Seattle averaging around C$ 338.
What is the cheapest day to depart on your flight to Chicago?
The cheapest day to depart on your flight to Chicago is on a Thursday when prices can be found for as low as C$ 619. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around C$ 1,143. These prices are subject to change though, so be sure to set up a Price Alert for flights to Chicago.
What is the cheapest time of day to depart on your flight to Chicago?
In the afternoon is the cheapest time of day to fly from Seattle to Chicago when you can find flight prices for as low as C$ 336. Flying to Chicago in the afternoon is an ideal time because this is during off-peak travel hours. In the evening is when there is more demand to fly to Chicago, so prices are often more expensive at around C$ 1,091 per ticket.
What is the cheapest Seattle/Tacoma Intl to Chicago flight route?
Fly from Seattle/Tacoma Intl to Chicago O'Hare Intl for the best Seattle/Tacoma Intl - Chicago flight prices
How far in advance should I book a flight to Chicago?
You are more likely to see cheaper flights to Chicago from Seattle when booking 6 weeks ahead of your departure date. In general, you can expect to find flights to Chicago for around C$ 420 when searching 6 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago from Seattle for as low as C$ 338 on momondo.
What cabin class options are available on Seattle/Tacoma Intl to Chicago flights?
There are 4 cabin classes available to choose from on Seattle/Tacoma Intl to Chicago flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
Can stopping save me money on Seattle to Chicago flights?
No. A direct flight is the cheapest option for a flight between Seattle to Chicago.
How have Seattle to Chicago flight prices changed over time?
As of June 2025, prices for Seattle to Chicago flights are approximately 32% cheaper when compared to flights at the same time last year.
How many flights depart from Seattle to Chicago on average per day?
As of June 2025, there are 56 flights per day flying from Seattle to Chicago. The most common time of day flights depart is 10:00a.m., with 46% of flights taking off at noon.
How many flights depart from Seattle to Chicago on average per week?
398 flights are operational weekly from Seattle to Chicago as of June 2025. The most popular departure day for this route is Thu, with 19% of flights per week taking off on this day.
When to book flights from Seattle to Chicago
Cheap Seattle to Chicago (SEA to CHI) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Seattle to Chicago
How far is Seattle/Tacoma Intl to Chicago by plane?
A flight from Seattle/Tacoma Intl to Chicago will travel around 2787.8 km. Flights usually cover this in 4h 00m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Chicago?
Prices for flights from Seattle/Tacoma Intl Airport to Chicago are updated daily.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Chicago?
The number of operators available for flights from Seattle/Tacoma Intl Airport to Chicago is 2 as of June 2025.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Chicago?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Chicago.
What documentation or ID do you need to fly to Chicago?
The necessary travel and health documents for your Chicago trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Seattle to Chicago?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Seattle to Chicago is Boeing 737-900 Passenger/BBJ3 (winglets) (18.49% of total bookings). The next most popular plane models are Boeing 737-800 (15.30%), Boeing 737-800 Passenger/BBJ2 (winglets) (11.56%), and Boeing 737 MAX 9 (11.21%).
What is the most popular airline from Seattle to Chicago?
momondo data reveals that the most frequently booked airline on the route from Seattle to Chicago is Alaska Airlines, representing 62% of all bookings. The subsequent popular airlines are Delta at 14%, Frontier at 13%, and American Airlines at 11%.
Best airlines flying from Seattle to Chicago
Compare and see reviews for airlines that fly from Seattle to Chicago with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom C$ 116 | Free Cancellation | Rating 8.0 7,946 reviews | |||
| PriceFrom C$ 212 | Free Cancellation | Rating 8.0 10,000 reviews |
Delta Flights From Seattle to Chicago
Delta operates around 12 flights from Seattle to Chicago every week. The average price of these flights found in the last 72 hours has been C$ 364, but momondo users have found Delta deals from Seattle to Chicago from as low as C$ 84 round-trip. Delta has been scored 8.0/10 in 7,946 reviews.
Alaska Airlines Flights From Seattle to Chicago
Across 10,000 Alaska Airlines reviews on momondo, the average score is 8.0/10. Alaska Airlines flies from Seattle to Chicago about 27 times each week, with ticket deals ranging from C$ 155 to C$ 268. Price data is based on momondo searches in the last 72 hours.
Travelling to a place near Chicago?
Book flights to Chicago if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Seattle to Chicago?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seattle to Chicago . Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from Seattle to Chicago with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to Chicago from Seattle with this policy.
How can momondo help me find flights from Seattle to Chicago?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Seattle to Chicago.
I’m not ready to book a flight from Seattle to Chicago right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to Chicago from Seattle. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.