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Cheap Flights from Chicago to SeaTac

Compare Chicago to SeaTac flight deals

Find the cheapest month or even day of the year to fly to SeaTac

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Flight deals from Chicago to SeaTac

Looking for a cheap last-minute deal or the best return flight from Chicago to SeaTac? Find the lowest prices on one-way and return tickets right here.
Seattle.Rs21,789 per passenger.Departing Sat, 4 Apr.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Chicago O'Hare International on Sat, 4 Apr, arriving in Seattle / Tacoma International.Price includes taxes and charges.From Rs21,789, select.
Seattle.Rs22,914 per passenger.Departing Tue, 12 May.One-way flight with Spirit Airlines.Outbound indirect flight with Spirit Airlines, departs from Chicago O'Hare International on Tue, 12 May, arriving in Seattle / Tacoma International.Price includes taxes and charges.From Rs22,914, select.
Seattle.Rs26,580 per passenger.Departing Tue, 24 Mar.One-way flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departs from Chicago O'Hare International on Tue, 24 Mar, arriving in Seattle / Tacoma International.Price includes taxes and charges.From Rs26,580, select.
Seattle.Rs27,022 per passenger.Departing Fri, 10 Apr.One-way flight with Hawaiian Airlines.Outbound direct flight with Hawaiian Airlines departs from Chicago O'Hare International on Fri, 10 Apr, arriving in Seattle / Tacoma International.Price includes taxes and charges.From Rs27,022, select.
Seattle.Rs27,413 per passenger.Departing Mon, 4 May.One-way flight with Delta.Outbound direct flight with Delta departs from Chicago O'Hare International on Mon, 4 May, arriving in Seattle / Tacoma International.Price includes taxes and charges.From Rs27,413, select.
Seattle.Rs33,807 per passenger.Departing Tue, 2 Jun.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Chicago O'Hare International on Tue, 2 Jun, arriving in Seattle / Tacoma International.Price includes taxes and charges.From Rs33,807, select.
Seattle.Rs36,021 per passenger.Departing Thu, 16 Jul.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Chicago O'Hare International on Thu, 16 Jul, arriving in Seattle / Tacoma International.Price includes taxes and charges.From Rs36,021, select.
Seattle.Rs36,477 per passenger.Departing Sat, 29 Aug.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Chicago O'Hare International on Sat, 29 Aug, arriving in Seattle / Tacoma International.Price includes taxes and charges.From Rs36,477, select.
Seattle.Rs40,663 per passenger.Departing Thu, 16 Jul.One-way flight with United.Outbound direct flight with United departs from Chicago O'Hare International on Thu, 16 Jul, arriving in Seattle / Tacoma International.Price includes taxes and charges.From Rs40,663, select.
Seattle.Rs41,190 per passenger.Departing Mon, 8 Jun.One-way flight with United.Outbound direct flight with United departs from Chicago O'Hare International on Mon, 8 Jun, arriving in Seattle / Tacoma International.Price includes taxes and charges.From Rs41,190, select.
Seattle.Rs41,190 per passenger.Departing Wed, 6 Jan.One-way flight with United.Outbound direct flight with United departs from Chicago O'Hare International on Wed, 6 Jan, arriving in Seattle / Tacoma International.Price includes taxes and charges.From Rs41,190, select.
Seattle.Rs41,190 per passenger.Departing Fri, 25 Sep.One-way flight with Southwest Airlines.Outbound direct flight with Southwest Airlines departs from Chicago Midway on Fri, 25 Sep, arriving in Seattle / Tacoma International.Price includes taxes and charges.From Rs41,190, select.
Seattle.Rs41,914 per passenger.Departing Mon, 26 Oct.One-way flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departs from Chicago O'Hare International on Mon, 26 Oct, arriving in Seattle / Tacoma International.Price includes taxes and charges.From Rs41,914, select.
Seattle.Rs42,344 per passenger.Departing Sat, 22 Aug.One-way flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departs from Chicago O'Hare International on Sat, 22 Aug, arriving in Seattle / Tacoma International.Price includes taxes and charges.From Rs42,344, select.
Seattle.Rs43,970 per passenger.Departing Sun, 20 Dec.One-way flight with Delta.Outbound direct flight with Delta departs from Chicago O'Hare International on Sun, 20 Dec, arriving in Seattle / Tacoma International.Price includes taxes and charges.From Rs43,970, select.
Seattle.Rs55,441 per passenger.Departing Fri, 27 Nov.One-way flight with Delta.Outbound direct flight with Delta departs from Chicago O'Hare International on Fri, 27 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From Rs55,441, select.

Chicago to SeaTac: Flight information

The things to know before you go.
Fly intoSeattle / Tacoma International Airport
Distance to SeaTac1.4 km
Cheapest flightRs21,789
Cheapest month to flyApril
Most popular airlineAmerican Airlines
Average flight time4 hrs, 37 mins

Find the cheapest month to fly from Chicago to SeaTac

We always keep an eye on fares, so you can find the best flight deal in seconds. It looks like Chicago to SeaTac flights are currently cheapest in April. We’ve based this on flights into Seattle / Tacoma International Airport.
Mar
from Rs26,580
Apr
from Rs21,789
May
from Rs22,914
Jun
from Rs33,807
Jul
from Rs36,021
Aug
from Rs36,477
Sep
from Rs41,190
Oct
from Rs41,914
Nov
from Rs55,441
Dec
from Rs43,970
Jan
from Rs41,190
Feb
Find prices

Finding cheap flights from Chicago to SeaTac: Frequently asked questions

There are 3 airports near SeaTac: Seattle / Tacoma International Airport, Seattle Boeing Fld Airport and Seattle Lake Union SPB Airport.
The best price we found for a return flight from Chicago to SeaTac is Rs44,768. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
American Airlines, Alaska Airlines, Iberia all offer direct flights to Seattle / Tacoma International Airport.
We've checked every Chicago to SeaTac fare we could find, and the cheapest upcoming date to fly seems to be on Wednesday, 29 April 2026. Overall, the cheapest month to fly from Chicago to SeaTac is usually April.
If you're flying from Chicago, the cheapest airport near SeaTac is Seattle / Tacoma International – which is 1.4 km away from the centre of SeaTac. We've found flights into this airport from Rs44,768.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Chicago to SeaTac on Wednesday, 29 April 2026.
No airlines currently offer direct flights between Chicago and SeaTac. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to SeaTac but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to SeaTac is around 40 days in advance, so don’t leave your flight to the last minute.
Seattle / Tacoma International Airport is 1.4km from SeaTac, Seattle Boeing Fld Airport is 8.5km from SeaTac, and Seattle Lake Union SPB Airport is 19.3km from SeaTac.
Seattle / Tacoma International Airport is closest to SeaTac, at around 1.4 km away.
The cheapest airline that flies to SeaTac is Frontier Airlines. And the cheapest airline that flies to Seattle Boeing Fld Airport is United.