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How to get the cheapest flight ticket from Chicago 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?
The cheapest month to fly to Seattle from Chicago is in February. Flight prices, which tend to average around R3 837, are often lower during this time because this is during the off-season. If you aren’t able to travel to Seattle during the month of February, then flying in September is also cheap. Prices for this month can be found on momondo for an average of R4 052.
What is the cheapest Chicago to Seattle/Tacoma Intl flight route?
Fly from Chicago O'Hare Intl to Seattle/Tacoma Intl for the best Chicago - 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 when booking 10 weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around R5 097 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 for as low as R4 393 on momondo.
What cabin class options are available on Chicago to Seattle/Tacoma Intl flights?
There are 1 cabin classes available to choose from on Chicago 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.
Can stopping save me money on Chicago to Seattle flights?
You could potentially save up to 51% on your flight if you consider stops on a Chicago to Seattle flight.
How have Chicago to Seattle flight prices changed over time?
As of June 2025, prices for Chicago to Seattle flights are approximately 40% cheaper when compared to flights at the same time last year.
When to book flights from Chicago to Seattle
Cheap Chicago to Seattle (CHI to SEA) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Chicago to Seattle
How far is Chicago to Seattle/Tacoma Intl by plane?
Chicago and Seattle/Tacoma Intl are 2787,8 km apart from one another.
When did momondo last update prices for flights from Chicago to Seattle/Tacoma Intl Airport?
Prices for flights from Chicago to Seattle/Tacoma Intl Airport are refreshed on a daily basis.
How old do you have to be to fly from Chicago to Seattle/Tacoma Intl Airport?
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 Chicago to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The travel and health documents required for your trip to Seattle/Tacoma Intl Airport 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 Seattle/Tacoma Intl Airport. 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 Chicago to Seattle?
Based on momondo bookings for flights between Chicago and Seattle, the leading plane model is Boeing 737-900 Passenger/BBJ3 (winglets), making up 19,52% of the total bookings. Other popular models include Boeing 737-800 with 13,88%, Boeing 737-800 Passenger/BBJ2 (winglets) with 13,69%, and Boeing 737 MAX 8 with 10,21%.
Travelling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locationsWhy use momondo?
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?
Flights from Chicago to Seattle with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from Chicago to Seattle?
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 Chicago to Seattle.
I’m not ready to book a flight from Chicago to Seattle right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of Chicago to Seattle flights. All you need is a valid email address and we will do the rest; it is that quick and easy.