Question 1

What is the cheapest airline that flies from Chicago to Seattle/Tacoma Intl?

Accepted Answer

Southwest, Delta, and Alaska Airlines are the most popular carriers operating from Chicago to Seattle/Tacoma Intl

Question 2

What airlines fly to Seattle?

Accepted Answer

Alaska Airlines, Delta and American Airlines are the top three most popular airlines that fly to Seattle from Chicago according to our data. Alaska Airlines is the first choice among our users, with 36% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 8 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

Question 3

Which layover airport offers the lowest fares from Chicago to Seattle?

Accepted Answer

Flights via Las Vegas (LAS) offer the lowest average round-trip price of $98.

Question 4

What is the cheapest time of day to depart on your flight to Seattle?

Accepted Answer

Flying to Seattle from Chicago in the evening is the least expensive time of day to depart. momondo users have found prices as low as $321 when looking at flights departing in the evening. Flights to Seattle are more costly in the morning, with an average ticket price of $378. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

Question 5

Which layover airport has the shortest travel time from Chicago to Seattle?

Accepted Answer

Flights connecting via Phoenix (PHX) have the shortest average one-way travel time: 7h 35m.

Question 6

How have Chicago to Seattle flight prices changed over time?

Accepted Answer

As of August 2025, prices for Chicago to Seattle flights are approximately 7% cheaper when compared to flights at the same time last year.

Question 7

How many flights depart from Chicago to Seattle on average per week?

Accepted Answer

325 flights are operational weekly from Chicago to Seattle as of August 2025. The most popular departure day for this route is Thu, with 22% of flights per week taking off on this day.

Question 8

How many flights depart from Chicago to Seattle on average per day?

Accepted Answer

The number of flights available between Chicago and Seattle is 46 per day as of August 2025. The most frequent departure time is 8:00PM, with 36% of daily flights leaving at noon.

Question 9

How far in advance should I book a flight to Seattle?

Accepted Answer

You are more likely to see cheaper flights to Seattle from Chicago when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $281 when searching 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 $242 on momondo.

Question 10

What cabin class options are available on Chicago to Seattle/Tacoma Intl flights?

Accepted Answer

There are 4 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.

Question 11

What is the cheapest day to depart on your flight to Seattle?

Accepted Answer

On average, the least expensive day to fly to Seattle from Chicago is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $332. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Monday is the most expensive day to depart from Chicago because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $447.

Question 12

What is the cheapest Chicago to Seattle/Tacoma Intl flight route?

Accepted Answer

Fly from Chicago Midway to Seattle/Tacoma Intl for the best Chicago - Seattle/Tacoma Intl flight prices

Question 13

Which layover airport has the shortest connection time from Chicago to Seattle?

Accepted Answer

Phoenix (PHX) has the shortest average layover time for this route: 1h 43m.

Question 14

Which airport is the most popular layover for flights between Chicago and Seattle?

Accepted Answer

Denver (DEN) was the most common stop: 76% of momondo users choosing 1-stop flights on this route connected there.

Question 15

What is the cheapest month to fly to Seattle?

Accepted Answer

In general, February is the cheapest month to fly from Chicago to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $214. If you don’t want to visit Seattle in February, then you should wait until April to fly from Chicago, when ticket prices are also cheap, with an average price of $229.

Question 16

Can stopping save me money on Chicago to Seattle flights?

Accepted Answer

No. A direct flight is the cheapest option for a flight between Chicago to Seattle.

Question 17

Which airlines fly direct from Chicago to Seattle?

Accepted Answer

You can get a direct flight from Chicago to Seattle. There are direct flights from both O'Hare International Airport (ORD) and Midway International Airport (MDW). Delta, American Airlines, United Airlines, and Alaska Airlines are the main airlines with direct flights from ORD to Seattle. If you are flying from MDW, you will only have flights from Southwest Airlines. There are also single-layover flights from Chicago to Seattle. These flights are available from both ORD and MDW. They have layovers in many cities, the most popular being Las Vegas and Phoenix, while Orlando and Washington are other regular stops. All flights will arrive at Seattle-Tacoma International Airport (SEA).

What is the best way to get in and out of airports in Chicago and Seattle?

The easiest way to get to O'Hare International Airport (ORD) by public transportation is to take the Chicago Transit Authority (CTA) Blue Line train. The Blue Line runs 24 hours a day, seven days a week, and stops at O'Hare's Terminal 2 and Terminal 3. If you're coming from downtown Chicago, you can catch the Blue Line at the Clark/Lake station or any other station along the Blue Line route. You can take the CTA Orange Line train to get to Midway International Airport (MDW). The Orange Line runs between the MDW and the Loop (downtown) of Chicago. You can catch the Orange Line at any station along the route, including the Loop stations. Both airports are also served by bus routes operated by the Chicago Transit Authority (CTA) and the Pace Suburban Bus Service. The Link Light Rail is a fast and convenient option from Seattle-Tacoma International Airport (SEA) to downtown Seattle. The SeaTac/Airport Station is located in the airport terminal, and you can take the Link Light Rail from there to downtown Seattle's Westlake Station. Sound Transit Express and King County Metro buses also run from SEA to downtown Seattle, with several different routes available.

What are the benefits of the different airports in Chicago and Seattle?

O'Hare International Airport (ORD) is one of the busiest airports in the world, offering more direct flights to Seattle, while Midway International Airport (MDW) is a smaller airport with fewer crowds and faster security lines. ORD is generally better for travelers looking for a wider range of flight options and amenities, while MDW may be more convenient for those who live on the south side of Chicago or in the suburbs. Both airports offer various transportation options from downtown Chicago. However, MDW is closer to downtown Chicago, making it a quicker trip. Seattle-Tacoma International Airport (SEA) offers many benefits, including its central location between Seattle and Tacoma, modern facilities, and numerous transportation options. It is also known for its sustainability initiatives, including its LEED-certified terminal and use of renewable energy. SEA has various shops, restaurants, and services to make your travel experience more comfortable and convenient. Moreover, its efficient security and baggage systems help minimize wait times.

Which cities can you get to from Seattle-Tacoma International Airport?

Tacoma is only about 30 minutes away by car, and it's home to the Museum of Glass, which features a large collection of contemporary glass art. Olympia, the capital of Washington State, is about an hour's drive from Seattle-Tacoma International Airport (SEA) and is known for its beautiful capitol building and scenic waterfront parks. Bellingham, located about 1h 30min north of SEA, is a college town home to Western Washington University and known for its vibrant arts scene. Portland, Oregon, is about three hours away and is famous for its food, craft beer, and numerous parks and gardens, including the International Rose Test Garden. The best way to get to these towns is using a rental car from SEA.

Question 18

When did momondo last update prices for flights from Chicago to Seattle/Tacoma Intl Airport?

Accepted Answer

Prices for flights from Chicago to Seattle/Tacoma Intl Airport refresh daily.

Question 19

How many operators does momondo search for flights from Chicago to Seattle/Tacoma Intl Airport?

Accepted Answer

As of August 2025, there are 8 operators available to choose from for flights from Chicago to Seattle/Tacoma Intl Airport.

Question 20

How old do you have to be to fly from Chicago to Seattle/Tacoma Intl Airport?

Accepted Answer

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.

Question 21

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

Accepted Answer

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.

Best Price Found	$124
Fastest flight time	4h 25m
Direct flights	Every day
Airports in Seattle	1 airport

Airline	Rating	Free Cancellation	Price
Hawaiian Airlines	PriceFrom $89	Free Cancellation	Rating 7.8 2,672 reviews	Search Hawaiian Airlines flights
Spirit Airlines	PriceFrom $97	Free Cancellation	Rating 6.3 8,035 reviews	Search Spirit Airlines flights
Frontier	PriceFrom $118	Free Cancellation	Rating 5.8 3,207 reviews	Search Frontier flights
Delta	PriceFrom $120	Free Cancellation	Rating 7.9 7,981 reviews	Search Delta flights
Alaska Airlines	PriceFrom $166	Free Cancellation	Rating 8.0 10,000 reviews	Search Alaska Airlines flights
United Airlines	PriceFrom $169	Free Cancellation	Rating 7.4 8,930 reviews	Search United Airlines flights
American Airlines	PriceFrom $169	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Southwest	PriceFrom $194	Free Cancellation	Rating 8.0 4,245 reviews	Search Southwest flights

Cheap flights from Chicago to Seattle from $95

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 to Seattle departing on 9/23. 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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What is the cheapest month to fly to Seattle?

What is the cheapest day to depart on your flight to Seattle?

What is the cheapest time of day to depart on your flight to Seattle?

What is the cheapest Chicago to Seattle/Tacoma Intl flight route?

Fly from Chicago Midway to Seattle/Tacoma Intl for the best Chicago - Seattle/Tacoma Intl flight prices

How far in advance should I book a flight to Seattle?

What cabin class options are available on Chicago to Seattle/Tacoma Intl flights?

There are 4 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?

No. A direct flight is the cheapest option for a flight between Chicago to Seattle.

How have Chicago to Seattle flight prices changed over time?

As of August 2025, prices for Chicago to Seattle flights are approximately 7% cheaper when compared to flights at the same time last year.

What is the cheapest airline that flies from Chicago to Seattle/Tacoma Intl?

Southwest, Delta, and Alaska Airlines are the most popular carriers operating from Chicago to Seattle/Tacoma Intl

What airlines fly to Seattle?

Which airport is the most popular layover for flights between Chicago and Seattle?

Denver (DEN) was the most common stop: 76% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Chicago to Seattle?

Flights via Las Vegas (LAS) offer the lowest average round-trip price of $98.

Which layover airport has the shortest travel time from Chicago to Seattle?

Flights connecting via Phoenix (PHX) have the shortest average one-way travel time: 7h 35m.

Which layover airport has the shortest connection time from Chicago to Seattle?

Phoenix (PHX) has the shortest average layover time for this route: 1h 43m.

How many flights depart from Chicago to Seattle on average per day?

The number of flights available between Chicago and Seattle is 46 per day as of August 2025. The most frequent departure time is 8:00PM, with 36% of daily flights leaving at noon.

How many flights depart from Chicago to Seattle on average per week?

325 flights are operational weekly from Chicago to Seattle as of August 2025. The most popular departure day for this route is Thu, with 22% of flights per week taking off on this day.

When to book flights from Chicago to Seattle

Cheap Chicago to Seattle (CHI to SEA) flight deals and tips

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When did momondo last update prices for flights from Chicago to Seattle/Tacoma Intl Airport?

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How old do you have to be to fly from Chicago to Seattle/Tacoma Intl Airport?

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

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