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? Stopover? Instantly customise your results.Trusted 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 return flights
Cheap one-way flights
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 January is, on average, the cheapest month to fly to Chicago from Seattle, with most prices found around R4 057. If you are unable to visit Chicago during the month of January, then departing from Seattle during the month September is also very affordable. Most momondo users find prices during this month for around R4 421.
What is the cheapest time of day to depart on your flight to Chicago?
Our data shows that the cheapest Seattle to Chicago flights are usually those with departure times at midday. Our users have found flights to Chicago at midday for as low as R0. Try not to purchase tickets in the morning because they tend to be around R16 379. Of course, these prices can vary depending on the time of year and what airport you fly to.
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 R5 637 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 R4 767 on momondo.
What cabin class options are available on Seattle/Tacoma Intl to Chicago flights?
There are 2 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.
How have Seattle to Chicago flight prices changed over time?
As of March 2025, prices for Seattle to Chicago flights are approximately 1% more expensive when compared to flights at the same time last year.
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.
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 old do you have to be to fly from Seattle/Tacoma Intl Airport to Chicago?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. 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 travel and health documents required for your trip to Chicago can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s licence, and a passport valid for six-months after you plan to arrive at Chicago. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
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 737-800 (24,96% of total bookings). The next most popular plane models are Boeing 737 MAX 8 (12,85%), Boeing 737-900 Passenger/BBJ3 (winglets) (12,26%), and Airbus A320-100/200 (11,77%).
Why use momondo?
Why should I use momondo to find a flight deal from Seattle to Chicago?
We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Seattle to Chicago for you.
Can I find flights from Seattle to Chicago with flexible booking policies on momondo?
All flight searches from Seattle to Chicago on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from Seattle to Chicago?
Once you have performed a search for Seattle to Chicago flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.
I’m not ready to book a flight from Seattle to Chicago right now. Can momondo alert me if prices change?
If you are not ready to book a flight from Seattle to Chicago now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Chicago and let you know when they change.