Cheap flights from Seattle to Chicago from $71
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 8/30. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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 January is, on average, the cheapest month to fly to Chicago from Seattle, with most prices found around $223. If you’re not able to fly to Chicago in January, then September is your next best option. Flight prices from Seattle to Chicago during September average around $245.
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 Wednesday when prices can be found for as low as $396. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Seattle to Chicago for around $507.
What is the cheapest time of day to depart on your flight to Chicago?
Our most recent data shows that the best time of day to fly to Chicago is in the afternoon. Flights from Seattle to Chicago during this time can be as low as $290. In contrast, the most expensive time of day to depart to Chicago is in the morning when prices are around $462.
What is the cheapest Seattle/Tacoma Intl to Chicago flight route?
Fly from Seattle/Tacoma Intl to Chicago Midway 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 weeks ahead of your departure date. In general, you can expect to find flights to Chicago for around $307 when searching 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 $255 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.
What is the cheapest airline that flies from Seattle/Tacoma Intl to Chicago?
Frontier, Spirit Airlines, and Hawaiian Airlines are the most popular carriers operating from Seattle/Tacoma Intl to Chicago
What airlines fly to Chicago?
Alaska Airlines, Delta and United Airlines are the top three most popular airlines that fly to Chicago from Seattle according to our data. Alaska Airlines is the first choice among our users, with 35% of people opting to fly with this airline when traveling to Chicago. Keep in mind that there are 8 different airlines that fly to Chicago on a routine basis, so you have a few additional options to choose from.
How many flights depart from Seattle to Chicago on average per day?
57 flights are operational daily from Seattle to Chicago as of July 2025. The most popular departure time for this route is 10:00AM, with 52% of flights per day taking off at noon.
How many flights depart from Seattle to Chicago on average per week?
As of July 2025, 403 flights take off from Seattle and land in Chicago each week. The most common flight departure day for this route is Mon, with 21% of weekly flights 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?
Chicago is 1732.3 mi away from Seattle/Tacoma Intl. In terms of flight time, this usually takes a little over 3h 55m.
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 refresh daily.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Chicago?
As of July 2025, there are 8 operators available to choose from for flights from Seattle/Tacoma Intl Airport to Chicago.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Chicago?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to 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 flights between Seattle and Chicago, the leading plane model is Boeing 737-900 Passenger/BBJ3 (winglets), making up 17.74% of the total bookings. Other popular models include Boeing 737-800 with 14.44%, Boeing 737-800 Passenger/BBJ2 (winglets) with 11.95%, and Boeing 737 MAX 9 with 11.76%.
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 38% of all bookings. The subsequent popular airlines are Delta at 25%, United Airlines at 18%, 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 $107 | Free Cancellation | Rating 6.3 8,103 reviews | |||
| PriceFrom $121 | Free Cancellation | Rating 7.8 2,540 reviews | |||
| PriceFrom $125 | Free Cancellation | Rating 8.0 7,983 reviews | |||
| PriceFrom $137 | Free Cancellation | Rating 5.9 3,290 reviews | |||
| PriceFrom $161 | Free Cancellation | Rating 7.4 8,861 reviews | |||
| PriceFrom $168 | Free Cancellation | Rating 8.0 10,000 reviews | |||
| PriceFrom $169 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $170 | Free Cancellation | Rating 8.0 4,272 reviews |
Delta Flights From Seattle to Chicago
Delta flies from Seattle to Chicago around 14 times per week, with 7,975 momondo users rating the airline 8.0/10. The cheapest Delta deal from Seattle to Chicago in the last 72 hours was $125 (round-trip), much lower than the average airfare cost of $420 for Delta flights on this route.
Alaska Airlines Flights From Seattle to Chicago
$168 is the best Alaska Airlines flight deal from Seattle to Chicago found on momondo over the last 72 hours. The average Alaska Airlines ticket price found was closer to $319, however, with flight time and availability significantly affecting the price. Alaska Airlines (8.0/10 from 10,000 user reviews) flies into Chicago from Seattle 34 times in an average week so prices can vary.
Traveling 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?
Finding the right flight to Chicago from Seattle is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Chicago quick and easy, saving you time and money.
Can I find flights from Seattle to Chicago with flexible booking policies on momondo?
momondo does allow users to show only those flights to Chicago from Seattle which offer a flexible booking policy as well as other useful filters and features.
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 can track prices for Seattle to Chicago flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.