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Cheap flights from Florida Keys to Seattle (SEA)

EYW — SEA
Jun 26 — Jul 31
Fri 6/26
Fri 7/3
1 adult, Economy
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Find flight deals from Florida Keys to Seattle

Keep the following information in mind while searching for Florida Keys to Seattle flight deals. Data was last updated May 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$327
(Kiwi.com)

One-way from

$155
(CheapOair)
Provider with most accurate pricing for Key West-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Key West-Seattle/Tacoma Intl flights.
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From Florida Keys to Seattle/Tacoma Intl
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One-way flight from Florida Keys to Seattle/Tacoma Intl
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Cheapflights Insights

Everything you need to know about your flight from Florida Keys to Seattle

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

Booking 90 days in advance of your planned departure date is, on average, the best time to get cheap flights from Florida Keys to Seattle. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, October is the cheapest month in which you can book a flight from Florida Keys to Seattle (average of $92). Flying from Florida Keys to Seattle in May is currently the most expensive (average of $178). 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.

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 May 27, 2026.
Get a feel of what it's like to fly with Alaska Airlines,Delta, andHawaiian Airlines from Florida Keys to Seattle by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
7.9
Good
12,421 reviews

Food

7.1

Overall

7.9

Crew

8.5

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well
Alaska Airlines
7.9
Good
12,421 reviews
Alaska Airlines
7.9
Good
12,421 reviews

Food

7.1

Overall

7.9

Crew

8.5

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well
Delta
7.9
Good
8,423 reviews
Alaska Airlines
7.9
Good
12,421 reviews

Food

7.1

Overall

7.9

Crew

8.5

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well
Hawaiian Airlines
7.8
Good
2,835 reviews
Alaska Airlines
7.9
Good
12,421 reviews

Food

7.1

Overall

7.9

Crew

8.5

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well
American Airlines
7.1
Good
11,639 reviews
Alaska Airlines
7.9
Good
12,421 reviews

Food

7.1

Overall

7.9

Crew

8.5

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well
Frontier
5.6
Fair
2,932 reviews
Alaska Airlines
7.9
Good
12,421 reviews

Food

7.1

Overall

7.9

Crew

8.5

Comfort

7.8

Entertainment

7.0

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Eugene,Mar 2026

MFR - SEA

Alaska Airlines is is always good. There where few choices of what to drink, and no food. No blankets, no pillows, and you h ats ok. I just had open heart surgery And i could have used something. But the flight and the crew where exelent. So all is well

Related info for your journey

Find useful and relevant information for your journey from Florida Keys 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 Florida Keys?

    Most people fly into Seattle/Tacoma Intl (SEA) if they book a flight to Seattle from Florida Keys. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

  • How long is the flight from Florida Keys to Seattle?

    For as low as $371, Alaska Airlines can have you in Seattle from Florida Keys in 6h 40m. There are 2719 mi between Florida Keys and Seattle. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Florida Keys to Seattle one-way?

    One-way options have recently been found by users for as low as $100 on Frontier. Other airlines that offer cheap prices include United Airlines from $119 and Alaska Airlines from $119 one-way.

  • Can I find deals for flights from Florida Keys to Seattle that include hotel bookings?

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

  • How can I find direct flights from Florida Keys to Seattle?

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

  • Can I find deals for business class flights from Florida Keys to Seattle?

    Yes. Cheapflights offers flight deals from Florida Keys 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.

  • What is the cheapest month to book a flight from Florida Keys to Seattle?

    Currently, October is the cheapest month in which you can book a flight from Florida Keys to Seattle (average of $92). Flying from Florida Keys to Seattle in May is currently the most expensive (average of $178). 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.

See more FAQs

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Tacoma
Lacey
Ocean Shores
Olympia
Edmonds
Leavenworth
Snoqualmie
Tumwater
Tukwila
Puyallup
Kent
Lynnwood
Renton
Ellensburg
Fife
Lakewood
Issaquah
Marysville
Shoreline

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Florida Keys to Seattle

Discover the top airline that operate flights from Florida Keys to Seattle. 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 May 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$308Average$471FlexibilityNo cancel feeOn-time71%

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