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 2/9. 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
Hawaiian Airlines flights from Seattle to Chicago O'Hare Intl Airport
Our best Hawaiian Airlines deals on Seattle to Chicago O'Hare Intl Airport flight tickets
Sun Country Air flights from Seattle to Chicago O'Hare Intl Airport
Our best Sun Country Air deals on Seattle to Chicago O'Hare Intl Airport flight tickets
See travel insights to Chicago from
How to get the cheapest flight ticket from Seattle to Chicago O'Hare Intl Airport
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 typical price of a round-trip flight between Seattle and Chicago O'Hare Intl Airport?
What is the cheapest month to fly to Chicago O'Hare Intl Airport?
In general, September is the cheapest month to fly from Seattle to Chicago O'Hare Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around C$ 337. The month of January is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from Seattle averaging around C$ 350.
What is the cheapest day to depart on your flight to Chicago O'Hare Intl Airport?
The cheapest day to depart on your flight to Chicago O'Hare Intl Airport is on a Thursday when prices can be found for as low as C$ 552. This is often the case because there is less demand to fly during this day of the week. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Seattle to Chicago O'Hare Intl Airport for around C$ 1,135.
What is the cheapest time of day to depart on your flight to Chicago O'Hare Intl Airport?
In the afternoon is the cheapest time of day to fly from Seattle to Chicago O'Hare Intl Airport when you can find flight prices for as low as C$ 334. Flying to Chicago O'Hare Intl Airport in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are C$ 1,087 on average. Flights to Chicago O'Hare Intl Airport from Seattle in the evening are generally more expensive because this time of day is more convenient for travellers’ schedules.
What is the cheapest Seattle/Tacoma Intl to Chicago O'Hare Intl flight route?
Fly from Seattle/Tacoma Intl to Chicago O'Hare Intl for the best Seattle/Tacoma Intl - Chicago O'Hare Intl flight prices
How far in advance should I book a flight to Chicago O'Hare Intl Airport?
You are more likely to see cheaper flights to Chicago O'Hare Intl Airport from Seattle when booking 6 weeks ahead of your departure date. In general, you can expect to find flights to Chicago O'Hare Intl Airport for around C$ 416 when searching 6 weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago O'Hare Intl Airport from Seattle for as low as C$ 341 on momondo.
What cabin class options are available on Seattle/Tacoma Intl to Chicago O'Hare Intl flights?
There are 4 cabin classes available to choose from on Seattle/Tacoma Intl to Chicago O'Hare Intl 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 O'Hare Intl Airport flights?
No. A direct flight is the cheapest option for a flight between Seattle to Chicago O'Hare Intl Airport.
How have Seattle to Chicago O'Hare Intl Airport flight prices changed over time?
As of June 2025, prices for Seattle to Chicago O'Hare Intl Airport flights are approximately 8% cheaper when compared to flights at the same time last year.
How many flights depart from Seattle to Chicago O'Hare Intl Airport on average per day?
As of June 2025, 71 flights take off from Seattle and land in Chicago O'Hare Intl Airport each day. The most common flight departure time for this route is 10:00a.m., with 46% of daily flights taking off at noon.
How many flights depart from Seattle to Chicago O'Hare Intl Airport on average per week?
The number of flights available between Seattle and Chicago O'Hare Intl Airport is 501 per week as of June 2025. The most frequent departure day is Mon, with 16% of weekly flights leaving on this day.
When to book flights from Seattle to Chicago O'Hare Intl Airport
Cheap Seattle to Chicago O'Hare Intl Airport (SEA to ORD) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Seattle to Chicago O'Hare Intl Airport
How far is Seattle/Tacoma Intl to Chicago O'Hare Intl by plane?
The straight-line distance from Seattle/Tacoma Intl to Chicago O'Hare Intl is 2762.2 km. A reasonable flight in good conditions will take 4h 00m.
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Chicago O'Hare Intl Airport?
Prices for flights from Seattle/Tacoma Intl Airport to Chicago O'Hare Intl Airport are updated daily.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Chicago O'Hare Intl Airport?
As of June 2025, there are 2 operators available to choose from for flights from Seattle/Tacoma Intl Airport to Chicago O'Hare Intl Airport.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Chicago O'Hare Intl Airport?
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 layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Chicago O'Hare Intl Airport.
What documentation or ID do you need to fly to Chicago O'Hare Intl Airport?
The travel and health documents you'll need for your trip to Chicago O'Hare Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Chicago O'Hare Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Seattle to Chicago O'Hare Intl Airport?
Based on momondo bookings for flights between Seattle and Chicago O'Hare Intl Airport, the leading plane model is Boeing 737-900 Passenger/BBJ3 (winglets), making up 18.37% of the total bookings. Other popular models include Boeing 737-800 with 14.92%, Boeing 737-800 Passenger/BBJ2 (winglets) with 11.88%, and Boeing 737 MAX 9 with 11.18%.
What is the most popular airline from Seattle to Chicago O'Hare Intl Airport?
Based on momondo bookings for flights between Seattle and Chicago O'Hare Intl Airport, the leading airline is Alaska Airlines, making up 71% of the total bookings. Other popular airlines include Delta with 29%.
Best airlines flying from Seattle to Chicago O'Hare Intl Airport
Compare and see reviews for airlines that fly from Seattle to Chicago O'Hare Intl Airport with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom C$ 115 | Free Cancellation | Rating 8.0 7,963 reviews | |||
| PriceFrom C$ 210 | Free Cancellation | Rating 8.0 10,000 reviews |
Delta Flights From Seattle to Chicago O'Hare Intl Airport
Delta is one of the most popular airlines flying from Seattle to Chicago O'Hare Intl Airport, operating 18 flights/week on average for this route. A good Delta flight deal for Seattle to Chicago O'Hare Intl Airport starts from C$ 84 round-trip, up to an average price of C$ 364. Our users have rated Delta at 8.0/10.
Alaska Airlines Flights From Seattle to Chicago O'Hare Intl Airport
Alaska Airlines (8.0/10 from 10,000 reviews) operates around 37 flights from Seattle to Chicago O'Hare Intl Airport in any given week. The average Alaska Airlines airfare for this route is around C$ 268, with deals from around C$ 155 rare but found on momondo. Referenced prices are for round-trip Seattle to Chicago O'Hare Intl Airport flight 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?
It is quick and easy to find Seattle to Chicago flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Chicago that suits you.
Can I find flights from Seattle to Chicago with flexible booking policies on momondo?
Yes. All flights to Chicago from Seattle on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights from Seattle to Chicago?
momondo helps you find the best flight between Seattle and Chicago by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.
I’m not ready to book a flight from Seattle to Chicago right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of Seattle to Chicago flights. All you need is a valid email address and we will do the rest; it is that quick and easy.