Question 1

What are the cheapest airlines flying from Chicago to Seattle round-trip?

Accepted Answer

According to our current data, Hawaiian Airlines (£128), Alaska Airlines (£134), and United Airlines (£143) offers the cheapest pricing from Chicago to Seattle. Hawaiian Airlines is currently priced 37% below the average price you’ll pay for this route.

Question 2

What are the cheapest airlines to fly from Chicago to Seattle one-way?

Accepted Answer

£70 is the cheapest one-way deal found within the past few days, from Alaska Airlines. You may also be able to find cheap deals on Southwest and United Airlines, with prices starting from £73 and £73, respectively.

Question 3

How far ahead should I book a flight from Chicago to Seattle?

Accepted Answer

Booking 62 days in advance of your planned departure date is, on average, the best time to get cheap flights from Chicago to Seattle. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Question 4

What is the cheapest month to book a flight from Chicago to Seattle?

Accepted Answer

Currently, January is the cheapest month in which you can book a flight from Chicago to Seattle (average of £622). Flying from Chicago to Seattle in July is currently the most expensive (average of £946). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Question 5

What is the cheapest day to fly from Chicago to Seattle?

Accepted Answer

Travellers seeking maximum savings on their Chicago to Seattle flight should consider departing on Thursday mornings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Question 6

Weekly flight availability from Chicago to Seattle

Accepted Answer

The most flights from CHI to SEA are scheduled on a Wednesday (52 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (19 on average).

Question 7

E

Accepted Answer

In terms of precipitation, rainfall in Seattle ranges from 18.0 - 168.0 inches per month. November is typically the wettest month, when rainfall can reach 168.0 mm. July is typically the driest time to visit Seattle when rainfall is around 18.0 mm.

Question 8

E

Accepted Answer

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 19.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 5.0 C).

Question 9

What are the cheapest flights from Chicago to Seattle?

Accepted Answer

While on average a flight from Chicago to Seattle is generally £295, our data shows the cheapest flight currently is £62. When looking at the most popular route, (Chicago O'Hare Intl - Seattle/Tacoma Intl), you can expect to pay £131 for that flight.

Question 10

What are the most reliable airlines from Chicago to Seattle?

Accepted Answer

The top 3 most reliable airlines when flying from Chicago to Seattle are Austrian Airlines (85%), Brussels Airlines (83%) and Air France (83%).

Question 11

What is the cheapest day to fly round-trip from Chicago to Seattle?

Accepted Answer

It’s generally more expensive to depart on a Thursday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.

Question 12

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

Accepted Answer

Users have found that booking a flight from Chicago to Seattle at least 61 days early can save you up to 129% on average compared to booking a flight this week. If booking 61 days before your flight isn’t an option for you, users have found flights from Chicago to Seattle for as little as £270 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as £432 for flights departing within the next 3 days.

Question 13

What is the cheapest month to fly from Chicago to Seattle?

Accepted Answer

Flights from Chicago to Seattle lean towards being more expensive in December. Prices are generally better when you fly from Chicago to Seattle in February, with the cheapest ticket starting at £101.

Question 14

What is the cheapest time of day to fly from CHI to SEA?

Accepted Answer

When flying from Chicago to Seattle, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 39% versus a flight at midday.

Question 15

What airport do you fly into for flights to Seattle from Chicago?

Accepted Answer

Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly into when you book flights from Chicago to Seattle. 0 airlines have flights to Seattle/Tacoma Intl from Chicago on a regular basis. Booking flights from Chicago to Seattle/Tacoma Intl should not be difficult; the airport handles an average of 39 inbound flights from Chicago per day.

Question 16

Can I find deals for flights from Chicago to Seattle that include hotel bookings?

Accepted Answer

Yes. In addition to deals on Chicago to Seattle flights, Cheapflights offers holiday packages that include both flights and hotel.

Question 17

How can I find direct flights from Chicago to Seattle?

Accepted Answer

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chicago to Seattle.

Question 18

Can I find deals for business class flights from Chicago to Seattle?

Accepted Answer

Yes. Cheapflights offers flight deals from Chicago to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Question 19

How does Cheapflights help users find flights from Chicago to Seattle?

Accepted Answer

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Seattle from Chicago today with Cheapflights!

Question 20

Why should you use Cheapflights to find cheap flight tickets from Chicago to Seattle?

Accepted Answer

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Chicago to Seattle for you. Better yet — we are completely free to use.

Question 21

Can Cheapflights find flights from Chicago to Seattle with no change fees?

Accepted Answer

Yes, we can. To see specific flights from Chicago to Seattle with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Question 22

Can Cheapflights notify me if prices for flights from Chicago to Seattle become cheaper?

Accepted Answer

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

Round-trip from	£128
One-way from	£70
Popular in	December
Cheapest in	February
Average price	£241
Good round-trip deal	£455 or less
Good one-way deal	£119 or less

Cheap flights from Chicago to Seattle from £70

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 29/7. Fares are subject to change and may not be available on all flights or dates of travel.

Cheapflights Tip: The best prices from Chicago to Seattle/Tacoma Intl are usually found in February or September, booked 62 days in advance, depart on a Wednesday or Tuesday and return on a Tuesday

Cheap flight deals from Chicago to Seattle

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Find flight deals from Chicago to Seattle

Cheapest flights from Chicago to SeattleExplore the most affordable flight options available from Chicago to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 July 2025.

Explore the most affordable flight options available from Chicago to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 July 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Chicago to Seattle that are best for you.

Best time to book a flight from Chicago to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Chicago with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Chicago to Seattle

How far ahead should I book a flight from Chicago to Seattle?

Use this chart to determine the optimal time to book a return flight from Chicago to Seattle. Price data was last updated on 27 June 2025.

What is the cheapest month to book a flight from Chicago to Seattle?

What is the cheapest time of day to fly from CHI to SEA?

Find hourly flight availability from Chicago to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 4 July 2025.

Weekly flight availability from Chicago to Seattle

Explore weekly flight availability from Chicago to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 4 July 2025.

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated 4 July 2025.

Read through reviews of airlines operating flights from Chicago to Seattle, such as Alaska Airlines, Southwest, andDelta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Chicago to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly into for flights to Seattle from Chicago?

What are the cheapest airlines flying from Chicago to Seattle round-trip?

What are the cheapest airlines to fly from Chicago to Seattle one-way?

What are the most reliable airlines from Chicago to Seattle?

What are the cheapest flights from Chicago to Seattle?

Can I find deals for flights from Chicago to Seattle that include hotel bookings?

How can I find direct flights from Chicago to Seattle?

Can I find deals for business class flights from Chicago to Seattle?

What is the cheapest month to book a flight from Chicago to Seattle?

Travelling to a place near Chicago?

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How does Cheapflights help users find flights from Chicago to Seattle?

Why should you use Cheapflights to find cheap flight tickets from Chicago to Seattle?

Can Cheapflights find flights from Chicago to Seattle with no change fees?

Can Cheapflights notify me if prices for flights from Chicago to Seattle become cheaper?

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Cheapest flights from Chicago to Seattle
Explore the most affordable flight options available from Chicago to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 July 2025.