Cheap flights from Chicago O'Hare Intl Airport to Seattle from $55
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Chicago O'Hare Intl Airport to Seattle departing on 8/12. 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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American Airlines flights from Chicago O'Hare Intl Airport to Seattle
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United Airlines flights from Chicago O'Hare Intl Airport to Seattle
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How to get the cheapest flight ticket from Chicago O'Hare Intl Airport to Seattle
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 Seattle?
In general, September is the cheapest month to fly from Chicago O'Hare Intl Airport to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $207. If you don’t want to visit Seattle in September, then you should wait until February to fly from Chicago O'Hare Intl Airport, when ticket prices are also cheap, with an average price of $229.
What is the cheapest day to depart on your flight to Seattle?
On average, the least expensive day to fly to Seattle from Chicago O'Hare Intl Airport is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $336. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Chicago O'Hare Intl Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $438.
What is the cheapest time of day to depart on your flight to Seattle?
Flying to Seattle from Chicago O'Hare Intl Airport in the evening is the least expensive time of day to depart. momondo users have found prices as low as $324 when looking at flights departing in the evening. Flights to Seattle are more costly at noon, with an average ticket price of $386. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.
What is the cheapest Chicago O'Hare Intl to Seattle/Tacoma Intl flight route?
Fly from Chicago O'Hare Intl to Seattle/Tacoma Intl for the best Chicago O'Hare Intl - Seattle/Tacoma Intl flight prices
How far in advance should I book a flight to Seattle?
You are more likely to see cheaper flights to Seattle from Chicago O'Hare Intl Airport when booking 10 weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $284 when searching 10 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Chicago O'Hare Intl Airport for as low as $244 on momondo.
What cabin class options are available on Chicago O'Hare Intl to Seattle/Tacoma Intl flights?
There are 4 cabin classes available to choose from on Chicago O'Hare Intl to Seattle/Tacoma Intl 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 Chicago O'Hare Intl to Seattle/Tacoma Intl?
Alaska Airlines, United Airlines, and Hawaiian Airlines are the most popular carriers operating from Chicago O'Hare Intl to Seattle/Tacoma Intl
What airlines fly to Seattle?
Alaska Airlines, Delta and United Airlines are the top three most popular airlines that fly to Seattle from Chicago O'Hare Intl Airport according to our data. Alaska Airlines is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 7 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.
How many flights depart from Chicago O'Hare Intl Airport to Seattle on average per day?
As of June 2025, 45 flights take off from Chicago O'Hare Intl Airport and land in Seattle each day. The most common flight departure time for this route is 7:00PM, with 36% of daily flights taking off at noon.
How many flights depart from Chicago O'Hare Intl Airport to Seattle on average per week?
318 flights are operational weekly from Chicago O'Hare Intl Airport to Seattle as of June 2025. The most popular departure day for this route is Thu, with 21% of flights per week taking off on this day.
When to book flights from Chicago O'Hare Intl Airport to Seattle
Cheap Chicago O'Hare Intl Airport to Seattle (ORD to SEA) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Chicago O'Hare Intl Airport to Seattle
How far is Chicago O'Hare Intl to Seattle/Tacoma Intl by plane?
Seattle/Tacoma Intl is 1716.3 mi away from Chicago O'Hare Intl. A reasonable flight in good conditions will take 4h 27m.
When did momondo last update prices for flights from Chicago O'Hare Intl Airport to Seattle/Tacoma Intl Airport?
Prices for flights from Chicago O'Hare Intl Airport to Seattle/Tacoma Intl Airport refresh daily.
How many operators does momondo search for flights from Chicago O'Hare Intl Airport to Seattle/Tacoma Intl Airport?
As of June 2025, there are 7 operators available to choose from for flights from Chicago O'Hare Intl Airport to Seattle/Tacoma Intl Airport.
How old do you have to be to fly from Chicago O'Hare Intl Airport to Seattle/Tacoma Intl Airport?
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 Chicago O'Hare Intl Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The travel and health documents you'll need for your trip to Seattle/Tacoma 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 Seattle/Tacoma 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 Chicago O'Hare Intl Airport to Seattle?
momondo data reveals that the most frequently booked plane model on the route from Chicago O'Hare Intl Airport to Seattle is Boeing 737-900 Passenger/BBJ3 (winglets), representing 19.57% of all bookings. The subsequent popular models are Boeing 737-800 Passenger/BBJ2 (winglets) at 13.81%, Boeing 737-800 at 13.69%, and Boeing 737 MAX 8 at 10.02%.
What is the most popular airline from Chicago O'Hare Intl Airport to Seattle?
momondo data reveals that the most frequently booked airline on the route from Chicago O'Hare Intl Airport to Seattle is Alaska Airlines, representing 36% of all bookings. The subsequent popular airlines are Delta at 27%, United Airlines at 18%, and American Airlines at 14%.
Best airlines flying from Chicago O'Hare Intl Airport to Seattle
Compare and see reviews for airlines that fly from Chicago O'Hare Intl Airport to Seattle with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $87 | Free Cancellation | Rating 7.8 2,494 reviews | |||
| PriceFrom $105 | Free Cancellation | Rating 6.3 8,052 reviews | |||
| PriceFrom $118 | Free Cancellation | Rating 5.9 3,295 reviews | |||
| PriceFrom $139 | Free Cancellation | Rating 8.0 7,946 reviews | |||
| PriceFrom $157 | Free Cancellation | Rating 8.0 10,000 reviews | |||
| PriceFrom $161 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom $169 | Free Cancellation | Rating 7.2 10,000 reviews |
Delta Flights From Chicago O'Hare Intl Airport to Seattle
Delta operates around 17 flights from Chicago O'Hare Intl Airport to Seattle every week. The average price of these flights found in the last 72 hours has been $268, but momondo users have found Delta deals from Chicago O'Hare Intl Airport to Seattle from as low as $139 round-trip. Delta has been scored 8.0/10 in 7,950 reviews.
Alaska Airlines Flights From Chicago O'Hare Intl Airport to Seattle
Across 10,000 Alaska Airlines reviews on momondo, the average score is 8.0/10. Alaska Airlines flies from Chicago O'Hare Intl Airport to Seattle about 9 times each week, with ticket deals ranging from $157 to $292. Price data is based on momondo searches in the last 72 hours.
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Why should I use momondo to find a flight deal from Chicago to Seattle?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Seattle from Chicago.
Can I find flights from Chicago to Seattle with flexible booking policies on momondo?
momondo does allow users to show only those flights to Seattle from Chicago which offer a flexible booking policy as well as other useful filters and features.
How can momondo help me find flights from Chicago to Seattle?
momondo provides multiple filters to help you find the best flight to Seattle from Chicago. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.
I’m not ready to book a flight from Chicago to Seattle right now. Can momondo alert me if prices change?
Price alerts on flights to Seattle from Chicago are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.