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Cheap Flights from Seattle (SEAA) to Chicago (ORD)

Compare Seattle to Chicago O'Hare International flight deals

Find the cheapest month or even day of the year to fly to Chicago O'Hare International

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Flight deals from Seattle to Chicago O'Hare International

Looking for a cheap last-minute deal or the best return flight from Seattle to Chicago O'Hare International Airport? If you want to travel next month, return fares start from $369. Find the lowest prices on one-way and return tickets right here.
Chicago.$345 per passenger.Departing Wed, 26 Aug, returning Tue, 22 Sep.Return flight with Frontier Airlines and Alaska Airlines.Outbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Wed, 26 Aug, arriving in Chicago O'Hare International.Inbound indirect flight with Alaska Airlines, departs from Chicago O'Hare International on Tue, 22 Sep, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $345, select.
Chicago.$352 per passenger.Departing Thu, 1 Oct, returning Wed, 7 Oct.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Thu, 1 Oct, arriving in Chicago O'Hare International.Inbound indirect flight with Frontier Airlines, departs from Chicago O'Hare International on Wed, 7 Oct, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $352, select.
Chicago.$367 per passenger.Departing Mon, 9 Nov, returning Sat, 14 Nov.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Mon, 9 Nov, arriving in Chicago O'Hare International.Inbound indirect flight with Frontier Airlines, departs from Chicago O'Hare International on Sat, 14 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $367, select.
Chicago.$368 per passenger.Departing Fri, 30 Oct, returning Sat, 7 Nov.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Fri, 30 Oct, arriving in Chicago O'Hare International.Inbound indirect flight with Frontier Airlines, departs from Chicago O'Hare International on Sat, 7 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $368, select.
Chicago.$368 per passenger.Departing Tue, 22 Sep, returning Sat, 26 Sep.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Tue, 22 Sep, arriving in Chicago O'Hare International.Inbound indirect flight with Frontier Airlines, departs from Chicago O'Hare International on Sat, 26 Sep, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $368, select.
Chicago.$368 per passenger.Departing Sat, 26 Sep, returning Mon, 19 Oct.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Sat, 26 Sep, arriving in Chicago O'Hare International.Inbound indirect flight with Frontier Airlines, departs from Chicago O'Hare International on Mon, 19 Oct, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $368, select.
Chicago.$369 per passenger.Departing Sat, 29 Aug, returning Mon, 31 Aug.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Sat, 29 Aug, arriving in Chicago O'Hare International.Inbound indirect flight with Frontier Airlines, departs from Chicago O'Hare International on Mon, 31 Aug, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $369, select.
Chicago.$374 per passenger.Departing Sat, 24 Oct, returning Wed, 4 Nov.Return flight with Delta.Outbound direct flight with Delta departs from Seattle / Tacoma International on Sat, 24 Oct, arriving in Chicago O'Hare International.Inbound direct flight with Delta departs from Chicago O'Hare International on Wed, 4 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $374, select.
Chicago.$374 per passenger.Departing Tue, 8 Sep, returning Tue, 13 Oct.Return flight with American Airlines.Outbound direct flight with American Airlines departs from Seattle / Tacoma International on Tue, 8 Sep, arriving in Chicago O'Hare International.Inbound direct flight with American Airlines departs from Chicago O'Hare International on Tue, 13 Oct, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $374, select.
Chicago.$374 per passenger.Departing Sat, 10 Oct, returning Sat, 17 Oct.Return flight with United.Outbound direct flight with United departs from Seattle / Tacoma International on Sat, 10 Oct, arriving in Chicago O'Hare International.Inbound direct flight with United departs from Chicago O'Hare International on Sat, 17 Oct, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $374, select.
Chicago.$374 per passenger.Departing Tue, 3 Nov, returning Tue, 17 Nov.Return flight with Delta.Outbound direct flight with Delta departs from Seattle / Tacoma International on Tue, 3 Nov, arriving in Chicago O'Hare International.Inbound direct flight with Delta departs from Chicago O'Hare International on Tue, 17 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $374, select.
Chicago.$374 per passenger.Departing Wed, 26 Aug, returning Tue, 22 Sep.Return flight with Delta.Outbound direct flight with Delta departs from Seattle / Tacoma International on Wed, 26 Aug, arriving in Chicago O'Hare International.Inbound direct flight with Delta departs from Chicago O'Hare International on Tue, 22 Sep, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $374, select.
Chicago.$389 per passenger.Departing Wed, 26 Aug, returning Sat, 29 Aug.Return flight with Delta.Outbound direct flight with Delta departs from Seattle / Tacoma International on Wed, 26 Aug, arriving in Chicago O'Hare International.Inbound direct flight with Delta departs from Chicago O'Hare International on Sat, 29 Aug, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $389, select.
Chicago.$389 per passenger.Departing Tue, 1 Sep, returning Wed, 9 Sep.Return flight with Delta.Outbound direct flight with Delta departs from Seattle / Tacoma International on Tue, 1 Sep, arriving in Chicago O'Hare International.Inbound direct flight with Delta departs from Chicago O'Hare International on Wed, 9 Sep, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $389, select.
Chicago.$405 per passenger.Departing Sun, 30 Aug, returning Mon, 19 Oct.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Sun, 30 Aug, arriving in Chicago O'Hare International.Inbound indirect flight with Frontier Airlines, departs from Chicago O'Hare International on Mon, 19 Oct, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $405, select.
Chicago.$431 per passenger.Departing Sun, 30 Aug, returning Mon, 19 Oct.Return flight with Delta.Outbound direct flight with Delta departs from Seattle / Tacoma International on Sun, 30 Aug, arriving in Chicago O'Hare International.Inbound direct flight with Delta departs from Chicago O'Hare International on Mon, 19 Oct, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $431, select.

Find the cheapest month to fly from Seattle to Chicago O'Hare International

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Seattle to Chicago O'Hare International flights are currently cheapest in October.
Jul
from $573
Aug
from $369
Sep
from $368
Oct
from $352
Nov
from $367
Dec
from $510
Jan
from $510
Feb
from $510
Mar
from $539
Apr
from $538
May
from $596
Jun
Find prices

Direct flights from Seattle to Chicago O'Hare International

Seattle to Chicago O'Hare International: Alternative routes

Compare routes from Seattle to Chicago below. You may find an airport to fly into that's cheaper, faster, or easier than Chicago O'Hare International.

Chicago Midway

14km from central Chicago
Closest
from $373
Search flights

Chicago O'Hare International

25km from central Chicago
Cheapest
from $345
Search flights

Chicago Rockford

127km from central Chicago
from $469
Search flights

Seattle to Chicago: Flight information

The things to know before you go.
Cheapest flight found$345
Cheapest month to flyAugust
Average flight time4 hrs, 11 mins
Most popular airlineAmerican Airlines
Average flights per week537

Finding cheap flights from Seattle to Chicago O'Hare International: Frequently asked questions

The best price we found for a return flight from Seattle to Chicago O'Hare International is $345. 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.
4 hours and 10 minutes is the average flight time from Seattle to Chicago O'Hare International.
American Airlines, Qatar Airways and United fly direct from Seattle to Chicago O'Hare International.
As of July 2026, there are 543 flights per week flying from Seattle to Chicago O'Hare International.
The cheapest month to fly from Seattle to Chicago O'Hare International is usually August.
After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Seattle to Chicago O'Hare International Airport on Wednesday, 26 August 2026.
Yes – the average flight time is 4 hours and 10 minutes.
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 Chicago O'Hare International 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 Chicago is around 40 days in advance, so don’t leave your flight to the last minute.

Travelling from Seattle to Chicago O'Hare International Airport (ORD): What you need to know

  • Seattle's main airport is Seattle-Tacoma International Airport (SEA). Explore your options for leaving from here when booking your flights from Seattle to Chicago O'Hare International Airport (ORD).

  • 4 hours 5 minutes is the average journey time for a direct Seattle to Chicago O'Hare International Airport flight.

  • Chicago is two hours ahead of Seattle. Chicago O'Hare International Airport is located in Chicago, which runs on the UTC-6 timezone.

  • The most popular route is from Seattle-Tacoma International Airport (SEA) to Chicago O'Hare International Airport (ORD), with 105 direct services every week. If you want to be on your way right away, the earliest flight from SEA to ORD is the 12:05am American Airlines option. If you prefer travelling later, the last departure is at 11:59pm with American Airlines.

  • Your flight from Seattle to ORD won't wait if you're late, so be at the airport on time. Arrive up to one hour in advance for domestic flights and two hours ahead when you're travelling internationally.

  • If you're going away during a peak month like July, head to the airport even earlier. You'll want to arrive up to four hours before international flights and two hours ahead of a domestic departure. Security lines will be longer during peak periods like Thanksgiving and Christmas.

Airports in Seattle

Seattle-Tacoma International Airport (SEA)

  • Seattle-Tacoma International Airport (SEA) will have you travelling directly to your destination. Nonstop flights from Seattle to Chicago O'Hare International Airport (ORD) can be booked from this terminal.

  • Top airlines that have direct flights from Seattle to Chicago O'Hare International Airport out of SEA include:

  • The majority of travellers choose to book seats with Alaska Airlines between SEA and ORD.

  • American Airlines is the most punctual carrier on this route.

  • SEA is around 23 kilometres from central Seattle. If you're driving, catching a taxi or ride-sharing from the centre, it'll take 25 minutes or so to get there, depending on the traffic. If you're using public transport, expect the travel time to be around 35 minutes.

  • Want a relaxed start to your travels? Stay near Seattle-Tacoma International Airport. Whether you've booked an early flight from Seattle to Chicago O'Hare International Airport or just don't want to be rushed, these hotels offer the perfect solution:

  • Seattle-Tacoma International Airport has a strong on-time record, so you're unlikely to face delays. Departures from SEA touch down on schedule 80% of the time.

Seattle Paine Field International Airport (PAE)

  • PAE is about 40 kilometres from central Seattle. It'll take 40 minutes or so to get to the airport if you're driving from the city centre. Public transport takes roughly 1 hour 30 minutes.

  • Start your holiday sooner with an extra night away from home. Before your Seattle to ORD flight, unwind in one of these hotels near Seattle Paine Field International Airport:

  • Most flights that leave Seattle Paine Field International Airport get to their destination as expected. It maintains a high on-time performance rate of 80%.

About Chicago O'Hare International Airport (ORD)

Getting from Chicago O'Hare International Airport (ORD) to central Chicago

  • Chicago O'Hare International Airport is around 27 kilometres from central Chicago. It takes around 30 minutes or so to get to the city by car.

  • If you're travelling on public transport, expect a journey time of about 45 minutes.

How to find the cheapest flights from Seattle to Chicago O'Hare International Airport (ORD)

  • Right now, $145 is the best price we've found for a one-way ticket from Seattle to Chicago O'Hare International Airport. The cheapest price for a return flight is $345. Keep in mind fares can change due to availability at the time of booking.

  • Booking in advance is often the key to scoring a cheap flight from Seattle to ORD. Prices tend to rise as demand increases, so the closer your departure date, the more you'll likely spend on your ticket.

  • If you can be flexible with your travel plans, try using the 'Whole month' search tool. It'll give you the lowest price across the month when searching for your Seattle to Chicago O'Hare International Airport ticket.

  • Snapping up a cheap plane ticket from Seattle to ORD is easy with Price Alerts. Simply set up one of these automatic alerts and we'll let you know when prices go down.

  • Filters make it easier to land a deal on your flight from Seattle to Chicago O'Hare International Airport. Pick the airlines, flight times and number of stops that match your plans. Then sort the results by 'Cheapest' to zero in on the cheapest fare fast.

The best time to fly from Seattle to Chicago O'Hare International Airport (ORD)

  • It's time to work out your travel dates for your flight from Seattle to Chicago O'Hare International Airport (ORD). July is when most people visit Chicago. If you prefer a quieter vibe, think about going in January.

  • The warmest month in Chicago is July, with temperatures ranging between 16ºC (61ºF) and 28ºC (82ºF). Book your Seattle to ORD plane ticket then if you enjoy this type of weather.

  • Look for cheap tickets from Seattle to Chicago O'Hare International Airport in January if you like travelling in cooler conditions. Temperatures are at their lowest then, ranging between -12ºC (10ºF) and 3ºC (37ºF).

More about Chicago

  • Start your Chicago trip right by choosing the perfect place to stay. Once you've booked your flight from Seattle to Chicago O'Hare International Airport, browse our selection of accommodation options including:

  • There are so many things to discover in this city, it can be hard to figure out where to begin. Millennium Park, Art Institute of Chicago and Willis Tower are popular attractions which should feature on every Chicago itinerary.

Explore more of the United States

  • Chicago has loads to offer, but there are so many other corners of the United States just waiting to be explored. Around 290 kilometres southeast of Chicago, a trip to Indianapolis will fill your itinerary to the brim. Start with leading attractions like Lucas Oil Stadium, Eiteljorg Museum and The Children's Museum of Indianapolis.

  • Milwaukee is another sought-after destination in the United States and is around 121 kilometres north of Chicago. No journey is complete without experiencing Richards Duplex Apartments by Frank Lloyd Wright, Miller Park and Milwaukee County Zoo.

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Prices shown on this page are estimated lowest prices only. Found in the last 12 days.