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$247+ Cheap flights from Seattle to Key West (SEA - EYW)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/16. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — EYW
mar. 8 — mar. 151
sáb. 3/8
sáb. 3/15
1 adult, Economy
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The best prices from Seattle/Tacoma Intl to Key West are usually found in January or February, booked 65 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from Seattle to Key West

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Key West (EYW). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated marzo 3, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$247
(American Airlines)

Popular in

December

Cheapest in

January

Average price

$717
Provider with most accurate pricing for Seattle/Tacoma Intl-Key West flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Key West flights.
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From Seattle/Tacoma Intl to Key West
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Highest demand for flights based on searches. 5% potential increase in price ($37 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($30 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Find flight deals from Seattle to Key West

Cheapest flights from Seattle to Key West
Explore the most affordable flight options available from Seattle to Key West. Find the lowest fares from popular airlines and budget airlines, with prices last updated on marzo 3, 2025.

This American Airlines deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 4/1610:10 pmSEA - EYW
1 stop8h 26mAmerican Airlines
mié. 4/233:06 pmEYW - SEA
1 stop8h 58mAmerican Airlines
Deal found 3/3$247
This United Airlines deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 4/1611:59 pmSEA - EYW
2 stops15h 56mUnited Airlines
mié. 4/234:04 pmEYW - SEA
1 stop9h 39mUnited Airlines
Deal found 3/2$415
This Mytrip deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 4/1712:30 pmSEA - EYW
2 stops24h 50mMultiple Airlines
jue. 4/2410:23 amEYW - SEA
2 stops36h 28mMultiple Airlines
Deal found 3/3$430
This Delta deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/1811:35 pmSEA - EYW
1 stop10h 34mDelta
lun. 8/252:35 pmEYW - SEA
1 stop9h 07mDelta
Deal found 3/2$557

Find flights from Seattle to Key West within your budget

Customize your flight search to find flights from Seattle to Key West that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated marzo 3, 2025.

Fly from

Seattle

Fly to

Key West

Route

Depart

Return

Price

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

mié. 4/16

10:10 pm-9:36 am

1 stop8h 26m

Key West

mié. 4/23

3:06 pm-9:04 pm

1 stop8h 58m

$247

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

mié. 4/16

11:59 pm-6:55 pm

2 stops15h 56m

Key West

mié. 4/23

4:04 pm-10:43 pm

1 stop9h 39m

$415

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

jue. 4/17

12:30 pm-4:20 pm

2 stops24h 50m

Key West

jue. 4/24

10:23 am-7:51 pm

2 stops36h 28m

$430

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

lun. 8/18

11:35 pm-1:09 pm

1 stop10h 34m

Key West

lun. 8/25

2:35 pm-8:42 pm

1 stop9h 07m

$557

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

jue. 3/27

9:48 am-4:18 pm

3 stops27h 30m

$275

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

jue. 4/17

11:59 pm-6:55 pm

2 stops15h 56m

$298

SeattleKey West

SEA - EYW

SEAEYW

Seattle/Tacoma Intl

jue. 3/27

5:22 am-4:36 pm

1 stop8h 14m

$309

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/3

Compare providers for flights from Seattle to Key West

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Key West in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Key West flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Key West flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Key West flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Key West flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Key West flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Key West

Have a flexible travel schedule? Discover the best time to fly to Key West from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Seattle to Key West

Get recent, data-driven insights about flights from Seattle to Key West including ideal travel times, pricing trends, and more.

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

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Key West. Price data was last updated on February 28, 2025.

To ensure you get the cheapest price possible for a flight from Seattle to Key West, you should look to book at least 65 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, August is the cheapest month in which you can book a flight from Seattle to Key West (average of $328). Flying from Seattle to Key West in March is currently the most expensive (average of $503). 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.

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

Find hourly flight availability from Seattle to Key West. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated marzo 3, 2025.

One of the essential ways to save on airfare from Seattle to Key West is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the morning could potentially save you up to 11% on airfare.

Rainfall in Key West by month

Plan your trip to Key West by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Key West ranges from 1.5 - 6.7 inches per month. September is typically the wettest month, when rainfall can reach 6.7 in. February is typically the driest time to visit Key West when rainfall is around 1.5 in.

Temperature in Key West by month

Plan your trip to Key West by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Key West, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 69.8 F).

Reviews of airlines servicing Key West

Get insights into the airlines that provide service to Key West. 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 Key West. Reviews last updated marzo 3, 2025.
Delta
8.0
Very good
8,070 reviews

Crew

8.5

Comfort

8.0

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Joseph,Aug 2023

MSP - MCO

Even if you have delta comfort plus, they will move your overhead bag. One of the perks for upgrading is that you have dedicated space for your carry on with comfort plus with delta. They moved my carry on luggage (3) compartments back and put in bags for other passengers that should have gone under their respective seats. When deboarding the plane, there was no help from anyone to retrieve my luggage back several rows. Delta is turning into pure garbage.

Delta
8.0
Very good
8,070 reviews
Delta
8.0
Very good
8,070 reviews

Crew

8.5

Comfort

8.0

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Joseph,Aug 2023

MSP - MCO

Even if you have delta comfort plus, they will move your overhead bag. One of the perks for upgrading is that you have dedicated space for your carry on with comfort plus with delta. They moved my carry on luggage (3) compartments back and put in bags for other passengers that should have gone under their respective seats. When deboarding the plane, there was no help from anyone to retrieve my luggage back several rows. Delta is turning into pure garbage.

United Airlines
7.4
Good
8,679 reviews
Delta
8.0
Very good
8,070 reviews

Crew

8.5

Comfort

8.0

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Joseph,Aug 2023

MSP - MCO

Even if you have delta comfort plus, they will move your overhead bag. One of the perks for upgrading is that you have dedicated space for your carry on with comfort plus with delta. They moved my carry on luggage (3) compartments back and put in bags for other passengers that should have gone under their respective seats. When deboarding the plane, there was no help from anyone to retrieve my luggage back several rows. Delta is turning into pure garbage.

American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
8,070 reviews

Crew

8.5

Comfort

8.0

Food

7.3

Entertainment

7.9

Overall

8.0

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Joseph,Aug 2023

MSP - MCO

Even if you have delta comfort plus, they will move your overhead bag. One of the perks for upgrading is that you have dedicated space for your carry on with comfort plus with delta. They moved my carry on luggage (3) compartments back and put in bags for other passengers that should have gone under their respective seats. When deboarding the plane, there was no help from anyone to retrieve my luggage back several rows. Delta is turning into pure garbage.

Related info for your journey

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

  • What are the cheapest airlines flying from Seattle to Key West round-trip?

    Our cheapest airline available from Seattle to Key West is American Airlines. Our recent data shows that you can find tickets from as low as $247 on this airline. Additional options worth looking into are United Airlines and Delta, starting at $415 and $1,987 round-trip. American Airlines is 64% cheaper than the average price of flights available within the next 90 days to this destination.

  • Can I find deals for flights from Seattle to Key West that include hotel bookings?

    Yes. In addition to deals on Seattle to Key West flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Key West?

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

  • Can I find deals for business class flights from Seattle to Key West?

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

  • What is the cheapest month to book a flight from Seattle to Key West?

    Currently, August is the cheapest month in which you can book a flight from Seattle to Key West (average of $328). Flying from Seattle to Key West in March is currently the most expensive (average of $503). 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.

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Top 3 airlines flying from Seattle to Key West

Discover the top 3 airlines that operate flights from Seattle to Key West. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated marzo 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$308Average$526FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$408Average$668FlexibilityNo cancel feeOn-time71%
DeltaCheapest$478Average$883FlexibilityNo cancel feeOn-timeN/A
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