Cheap Flights from Chicago to Seattle from RM635

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Flight deals from Chicago to Seattle

Looking for a cheap last-minute deal or the best return flight from Chicago to Seattle? Find the lowest prices on one-way and return tickets right here.

Seattle.RM635 per passenger.Departing Sun, 12 Oct, returning Fri, 17 Oct.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Chicago O'Hare International on Sun, 12 Oct, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Fri, 17 Oct, arriving in Chicago O'Hare International.Price includes taxes and charges.From RM635, select.

Seattle.RM635 per passenger.Departing Wed, 29 Oct, returning Sat, 1 Nov.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Chicago O'Hare International on Wed, 29 Oct, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Sat, 1 Nov, arriving in Chicago O'Hare International.Price includes taxes and charges.From RM635, select.

Seattle.RM635 per passenger.Departing Mon, 3 Nov, returning Tue, 4 Nov.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Chicago O'Hare International on Mon, 3 Nov, arriving in Seattle / Tacoma International.Inbound indirect flight with Frontier Airlines, departs from Seattle / Tacoma International on Tue, 4 Nov, arriving in Chicago O'Hare International.Price includes taxes and charges.From RM635, select.

Seattle.RM716 per passenger.Departing Sat, 8 Nov, returning Sat, 15 Nov.Return flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departs from Chicago O'Hare International on Sat, 8 Nov, arriving in Seattle / Tacoma International.Inbound direct flight with Alaska Airlines departs from Seattle / Tacoma International on Sat, 15 Nov, arriving in Chicago O'Hare International.Price includes taxes and charges.From RM716, select.

Seattle.RM731 per passenger.Departing Tue, 27 Jan, returning Tue, 3 Feb.Return flight with Hawaiian Airlines and Alaska Airlines.Outbound direct flight with Hawaiian Airlines departs from Chicago O'Hare International on Tue, 27 Jan, arriving in Seattle / Tacoma International.Inbound direct flight with Alaska Airlines departs from Seattle / Tacoma International on Tue, 3 Feb, arriving in Chicago O'Hare International.Price includes taxes and charges.From RM731, select.

Seattle.RM741 per passenger.Departing Wed, 29 Oct, returning Sat, 1 Nov.Return flight with United.Outbound direct flight with United departs from Chicago O'Hare International on Wed, 29 Oct, arriving in Seattle / Tacoma International.Inbound direct flight with United departs from Seattle / Tacoma International on Sat, 1 Nov, arriving in Chicago O'Hare International.Price includes taxes and charges.From RM741, select.

Seattle.RM744 per passenger.Departing Sat, 18 Oct, returning Tue, 21 Oct.Return flight with United.Outbound direct flight with United departs from Chicago O'Hare International on Sat, 18 Oct, arriving in Seattle / Tacoma International.Inbound direct flight with United departs from Seattle / Tacoma International on Tue, 21 Oct, arriving in Chicago O'Hare International.Price includes taxes and charges.From RM744, select.

Seattle.RM744 per passenger.Departing Sat, 6 Dec, returning Tue, 9 Dec.Return flight with United.Outbound direct flight with United departs from Chicago O'Hare International on Sat, 6 Dec, arriving in Seattle / Tacoma International.Inbound direct flight with United departs from Seattle / Tacoma International on Tue, 9 Dec, arriving in Chicago O'Hare International.Price includes taxes and charges.From RM744, select.

Find the cheapest month to fly from Chicago to Seattle

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Chicago to Seattle flights are currently cheapest in October.

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Direct flights from Chicago to Seattle

Alternative Chicago to Seattle routes

Looking for the cheapest, fastest or easiest route from Chicago to Seattle? You could fly into the following airports instead.

Chicago to Seattle: Flight information

The things to know before you go.

Cheapest flight found	RM635
Cheapest month to fly	October
Average flight time	4 hrs, 38 mins
Most popular airline	American Airlines
Average flights per week	361

Finding cheap flights from Chicago to Seattle: Frequently asked questions

How many airports are there in Seattle?

There are 4 airports in Seattle: Seattle Lake Union SPB, Seattle Boeing Fld, Seattle / Tacoma International, and Paine Field.

How much are return flights from Chicago to Seattle?

The best price we found for a return flight from Chicago to Seattle is RM635. 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.

How long does it take to fly from Chicago to Seattle?

4 hours and 38 minutes is the average flight time from Chicago to Seattle.

Which airlines fly direct from Chicago to Seattle?

American Airlines, Qatar Airways and Air Tahiti Nui fly direct from Chicago to Seattle.

How many flights are there a week from Chicago to Seattle?

As of September 2025, there are 361 flights per week flying from Chicago to Seattle.

When is the cheapest time to fly from Chicago to Seattle?

The cheapest month to fly from Chicago to Seattle is usually October.

Which is the cheapest airport to fly into in Seattle?

If you're flying from Chicago, the cheapest airport near Seattle is Seattle / Tacoma International – which is 19.5 km away from the centre of Seattle. We've found flights into this airport from RM635.

Which upcoming date is cheapest to fly from Chicago to Seattle on?

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Chicago to Seattle on Sunday, 12 October 2025.

Can I get a direct flight from Chicago to Seattle?

Yes – the average flight time is 4 hours and 38 minutes.

How can I get the best flight deal from Chicago to Seattle?

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 Seattle 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.

When is the best time to book flights to Seattle?

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Seattle is around 40 days in advance, so don’t leave your flight to the last minute.

What’s the weather like in Seattle?

In September, the average temperature is usually around 15°C. August is typically the warmest month in Seattle, when it usually averages around 23°C. You can expect the least rain in July. The coldest month is December, with temperatures averaging 0°C. The rainiest month is November.

Which is the cheapest airline to fly from Chicago to Seattle with?

The cheapest airline that flies to Seattle is Frontier Airlines. And the cheapest airline that flies to Seattle Boeing Fld Airport is Alaska Airlines.

Flying from Chicago to Seattle: what you need to know

Many great adventures start at one of Chicago's main airports, O'Hare International Airport (ORD) or Chicago Midway International Airport (MDW). Check out your options for booking a flight from Chicago to Seattle taking off from either of these bases.
When it comes to where you'll touch down, Seattle's primary entry point is Seattle-Tacoma International Airport (SEA).
Take a direct Chicago to Seattle flight and you'll be travelling for an average of 4 hours 35 minutes.
The timezone in Seattle is UTC-7, which is two hours behind Chicago.
With 105 flights a week between the two airports, O'Hare International Airport (ORD) to Seattle-Tacoma International Airport (SEA) is the most popular route. Hop on the first flight from Chicago to Seattle with Alaska Airlines at 06:00. If you'd like to get more out of your day before taking off, the last departure from ORD to SEA is with United Airlines at 21:32.
For hassle-free travel, turn up at the airport two hours ahead of international flights and an hour before domestic departures. This ensures you have enough time to catch your Chicago to Seattle flight.
You'll likely experience bigger queues during popular months like August. Arriving up to four hours in advance for international flights and two hours for a domestic departure is a smart move.

How to find the cheapest flights from Chicago to Seattle

Currently, RM352 is the best price we've seen for a one-way ticket from Chicago to Seattle. The cheapest price for a return flight is RM635. Keep in mind fares may change due to availability at the time of booking.
To score cheap Chicago to Seattle flights, reserve your trip two months before your departure date.
Schedule your trip for May. That's the best month for scoring the biggest deals on plane tickets from Chicago to Seattle. If you have flexibility with your dates, use the 'Whole month' tool to see the cheapest price across every month.
Cut down on the time spent looking for cheap flights from Chicago to Seattle by creating a Price Alert. We'll send you an email or notification on the app when a new low fare is offered.
Save money on your Chicago to Seattle flight with the help of our filters. Choose your ideal times, airlines and number of stops, then sort the results by 'Cheapest' to see the best deals.

Flying from Chicago

O'Hare International Airport (ORD)

Set off from O'Hare International Airport (ORD) on a nonstop flight from Chicago to Seattle. From ORD, you can fly directly to Seattle-Tacoma International Airport (SEA).
Well-known airlines that offer direct Chicago to Seattle plane tickets departing from ORD include:
The journey from central Chicago to ORD takes about 55 minutes by public transport. If you drive, ride-share or take a cab, you'll cover the 26 kilometres in 35 minutes or so, depending on traffic.
Have an early flight from Chicago to Seattle? Avoid the stress of rushing to the terminal (and sneak in some extra precious sleep) by choosing one of these stays close to O'Hare International Airport:
When it comes to the on-time performance of O'Hare International Airport, 74.85% of flights arrive within the expected time frame.
You'll find ORD at 10000 West O'Hare.

Chicago Midway International Airport (MDW)

You can book a direct flight from Chicago to Seattle departing Chicago Midway International Airport (MDW). Nonstop connections from MDW will take you to Seattle-Tacoma International Airport (SEA).
Southwest Airlines offers direct Chicago to Seattle plane tickets from MDW. Book your preferred aisle (or window) seat and arrive at your destination in a single journey.
With public transport, you can travel from central Chicago to MDW in around 45 minutes. The terminal is roughly 14 kilometres away. Driving will take you about 20 minutes.
Want to treat yourself to an extra night away before catching your flight from Chicago to Seattle? Check in to a hotel near Chicago Midway International Airport before your break officially begins. These stays are calling your name:
78% of flights departing Chicago Midway International Airport arrive within the expected time frame.
MDW is located at 5700 South Cicero.

Arriving in Seattle

Seattle-Tacoma International Airport (SEA)

Seattle-Tacoma International Airport (SEA) is approximately 19 kilometres from central Seattle. If you're catching a cab or a ride-share, the drive takes around 20 minutes.
It typically takes 55 minutes to get there on public transport.
Consider booking a hotel close to SEA if you're coming in on a late flight from Chicago to Seattle. Settle into one of these options and avoid the hassle of a long transfer:
Fast-track your adventure by picking up a Seattle-Tacoma International Airport rental car. Grab your wheels from Thrifty, Europcar or Budget to explore Seattle and beyond.
To secure the lowest price, reserve your ride from Seattle-Tacoma International Airport around one week in advance of your Chicago to Seattle flight.

Lake Union Sea Plane Base Airport (LKE)

Central Seattle is about 3 kilometres from Lake Union Sea Plane Base Airport (LKE). As soon as your flight from Chicago to Seattle has touched down and you've made your way through the terminal, the drive should be around 10 minutes.
Travelling by public transport will take about 25 minutes.
You'll find some comfortable places ready to welcome you near LKE. Tuck yourself in after your Chicago to Seattle flight at one of these well-located options:

Best time to go to Seattle

July is the busiest month for flights from Chicago to Seattle. To skip the crowds, go to Seattle in May.
Before locking in your Chicago to Seattle tickets, think about the type of weather you enjoy. August is the warmest month in Seattle, with temperatures ranging from 12ºC (54ºF) to 28ºC (82ºF).
February has average temperatures of between -1ºC (30ºF) and 11ºC (52ºF). Search for cheap flights from Chicago to Seattle around that time if you want to travel in cooler conditions.

More about Seattle

Once you've booked your flight from Chicago to Seattle, take your pick from prime hotels that put you close to the action. Make one of these accommodation options your base for exploring Seattle:
All great holidays should include a little sightseeing. Greyhound: Bus Station, LMN Architects and Boeing Radiation Effects Lab are attractions you won't want to skip in Seattle.

Explore more of United States

You've visited Seattle, now it's time to explore more of United States. Travel about 241 kilometres south to Portland to tick off its popular sights. From Pioneer Courthouse Square to Portland Japanese Garden and Pittock Mansion, you'll have a full itinerary ahead.
Spokane is another sought-after destination in United States and is around 370 kilometres east of Seattle. No trip is complete without experiencing Manito Park, Northwest Museum of Arts & Culture and Spokane Falls.