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$119+ Cheap flights from Key Largo, FL to Seattle (SEA)

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 5/28. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — SEA
avr. 22 — avr. 291
mar. 4/22
mar. 4/29
1 adult, Economy
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Cheapflights Tip: The best prices from Key Largo to Seattle/Tacoma Intl are usually found in January or February, booked 71 days in advance, depart on a Wednesday or Thursday and return on a Wednesday

Cheap flight deals from Key Largo to Seattle

Keep the following information in mind while searching for Key Largo to Seattle flight deals. Data was last updated avril 17, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$181
(CheapOair)

One-way from

$119
(Delta)

Popular in

July

Cheapest in

January

Average price

$377
Provider with most accurate pricing for Miami-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Miami-Seattle/Tacoma Intl flights.
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From Key Largo to Seattle/Tacoma Intl
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One-way flight from Key Largo to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 13% potential increase in price ($58 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from Key Largo to Seattle

Cheapest flights from Key Largo to Seattle
Explore the most affordable flight options available from Key Largo to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on avril 17, 2025.

This CheapOair deal was found by Cheapflights users on 4/17. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 4/306:00 amMIA - SEA
1 stop21h 44mFrontier
mar. 5/66:00 amSEA - MIA
1 stop20h 22mFrontier
Deal found 4/17$181
This Alaska Airlines deal was found by Cheapflights users on 4/16. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jeu. 5/296:21 pmMIA - SEA
Nonstop6h 39mAlaska Airlines
lun. 6/28:25 amSEA - MIA
Nonstop5h 56mAlaska Airlines
Deal found 4/16$237
This Delta deal was found by Cheapflights users on 4/16. 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.
jeu. 5/86:15 pmMIA - SEA
Nonstop6h 41mDelta
mer. 5/148:00 amSEA - MIA
Nonstop6h 04mDelta
Deal found 4/16$239
This Expedia deal was found by Cheapflights users on 4/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ven. 5/96:00 amMIA - SEA
1 stop8h 31mMultiple Airlines
dim. 5/118:01 amSEA - MIA
Nonstop6h 00mMultiple Airlines
Deal found 4/15$243
This Hawaiian Airlines deal was found by Cheapflights users on 4/16. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 5/276:21 pmMIA - SEA
Nonstop6h 39mHawaiian Airlines
dim. 6/18:25 amSEA - MIA
Nonstop5h 56mHawaiian Airlines
Deal found 4/16$257
This Mytrip deal was found by Cheapflights users on 4/16. 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.
mar. 5/278:55 pmMIA - SEA
1 stop30h 15mSpirit Airlines
mer. 6/43:20 pmSEA - MIA
1 stop11h 23mSpirit Airlines
Deal found 4/16$258
This United Airlines deal was found by Cheapflights users on 4/15. 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.
ven. 5/93:28 pmMIA - SEA
1 stop10h 35mUnited Airlines
dim. 5/116:15 amSEA - MIA
2 stops11h 19mUnited Airlines
Deal found 4/15$276
This American Airlines deal was found by Cheapflights users on 4/16. 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.
jeu. 5/87:34 pmMIA - SEA
Nonstop6h 33mAmerican Airlines
mar. 5/1312:24 amSEA - MIA
Nonstop5h 46mAmerican Airlines
Deal found 4/16$279

Cheapflights Fare Finder

Customize your flight search to find flights from Key Largo to Seattle 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 avril 17, 2025.
Use the filters below to find and compare flights from Key Largo to Seattle that are best for you.

Fly from

Key Largo

Fly to

Seattle

Route

Depart

Return

Price

MiamiSeattle

MIA - SEA

MIASEA

Miami

mer. 4/30

6:00 am-12:44 am

1 stop21h 44m

Seattle/Tacoma Intl

sam. 5/10

6:00 am-5:22 am

1 stop20h 22m

$181

MiamiSeattle

MIA - SEA

MIASEA

Miami

jeu. 5/29

6:21 pm-10:00 pm

Nonstop6h 39m

Seattle/Tacoma Intl

lun. 6/2

8:25 am-5:21 pm

Nonstop5h 56m

$237

MiamiSeattle

MIA - SEA

MIASEA

Miami

jeu. 5/8

6:15 pm-9:56 pm

Nonstop6h 41m

Seattle/Tacoma Intl

mer. 5/14

8:00 am-5:04 pm

Nonstop6h 04m

$239

MiamiSeattle

MIA - SEA

MIASEA

Miami

ven. 5/9

6:00 am-11:31 am

1 stop8h 31m

Seattle/Tacoma Intl

dim. 5/11

8:01 am-5:01 pm

Nonstop6h 00m

$243

MiamiSeattle

MIA - SEA

MIASEA

Miami

mar. 5/27

6:21 pm-10:00 pm

Nonstop6h 39m

Seattle/Tacoma Intl

dim. 6/1

8:25 am-5:21 pm

Nonstop5h 56m

$257

MiamiSeattle

MIA - SEA

MIASEA

Miami

mar. 5/27

8:55 pm-12:10 am

1 stop30h 15m

Seattle/Tacoma Intl

mer. 6/4

3:20 pm-5:43 am

1 stop11h 23m

$258

MiamiSeattle

MIA - SEA

MIASEA

Miami

ven. 5/9

3:28 pm-11:03 pm

1 stop10h 35m

Seattle/Tacoma Intl

dim. 5/11

6:15 am-8:34 pm

2 stops11h 19m

$276

MiamiSeattle

MIA - SEA

MIASEA

Miami

jeu. 5/8

7:34 pm-11:07 pm

Nonstop6h 33m

Seattle/Tacoma Intl

mar. 5/13

12:24 am-9:10 am

Nonstop5h 46m

$279

MiamiSeattle

MIA - SEA

MIASEA

Miami

mer. 5/28

6:15 pm-9:56 pm

Nonstop6h 41m

$119

MiamiSeattle

MIA - SEA

MIASEA

Miami

jeu. 5/29

7:10 am-2:16 pm

1 stop10h 06m

$120

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/16

Showing 1-10 of 17 results
1
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Best time to book a flight from Key Largo to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Key Largo 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.

Cheapflights Insights

Everything you need to know about your flight from Key Largo to Seattle

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

Use this chart to determine the optimal time to book a round-trip flight from Key Largo to Seattle. Price data was last updated on April 11, 2025.

To ensure you get the cheapest price possible for a flight from Key Largo to Seattle, you should look to book at least 71 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 Key Largo to Seattle?

Currently, January is the cheapest month in which you can book a flight from Key Largo to Seattle (average of $238). Flying from Key Largo to Seattle in July is currently the most expensive (average of $411). 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 KE9 to SEA?

Find hourly flight availability from Key Largo 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 avril 17, 2025.

When flying from Key Largo to Seattle, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What is the cheapest day to fly from Key Largo to Seattle?

Use this chart to determine the cheapest time to fly round-trip from Key Largo to Seattle. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Key Largo to Seattle flight should consider departing on Tuesday at noon when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Key Largo to Seattle

Explore weekly flight availability from Key Largo 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 avril 17, 2025.

The most flights from KE9 to SEA are scheduled on a Thursday (8 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (3 on average).

Rainfall in Seattle by month

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

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

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

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 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

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 avril 17, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta from Key Largo to Seattle. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,887 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.1

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,887 reviews
Alaska Airlines
8.0
Very good
9,887 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.1

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very good
4,280 reviews
Alaska Airlines
8.0
Very good
9,887 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.1

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,916 reviews
Alaska Airlines
8.0
Very good
9,887 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.1

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Hawaiian Airlines
7.9
Good
2,380 reviews
Alaska Airlines
8.0
Very good
9,887 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.1

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,667 reviews
Alaska Airlines
8.0
Very good
9,887 reviews

Overall

8.0

Food

7.1

Boarding

8.1

Entertainment

7.1

Comfort

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

Find useful and relevant information for your journey from Key Largo 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 Key Largo?

    Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly into when you book flights from Key Largo to Seattle. 7 airlines have flights to Seattle/Tacoma Intl from Key Largo on a regular basis. Booking flights from Key Largo to Seattle/Tacoma Intl should not be difficult; the airport handles an average of 6 inbound flights from Key Largo per day.

  • How popular is this Key Largo to Seattle flight route?

    Within the past month, 27 users have taken a look at flights from Key Largo to Seattle/Tacoma Intl.

  • What are the cheapest airlines to fly from Key Largo to Seattle one-way?

    $119 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on Frontier and United Airlines, with prices starting from $120 and $129, respectively.

  • What are the most reliable airlines from Key Largo to Seattle?

    No one likes to see their flight delayed. When booking a flight from Key Largo to Seattle consider choosing GOL (73%), American Airlines (70%) or Delta (69%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Key Largo to Seattle?

    Looking for the cheapest flight from Key Largo to Seattle? While on average our users pay $888, our data indicates the cheapest price to be $118. The most popular route (Miami - Seattle/Tacoma Intl), is priced around $181.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Key Largo 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 Key Largo to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Key Largo to Seattle (average of $238). Flying from Key Largo to Seattle in July is currently the most expensive (average of $411). 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 Key Largo?

Book flights to Key Largo if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Renton
Lakewood
Ocean Shores
Lacey
Leavenworth
Federal Way
Olympia
Shoreline
Cle Elum
Centralia
Aberdeen
Kent
Lynnwood
Shelton
Silverdale
Redmond
Issaquah

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Key Largo to Seattle

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Top 7 airlines flying from Key Largo to Seattle

Discover the top 7 airlines that operate flights from Key Largo 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 avril 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$88Average$282FlexibilityNo cancel feeOn-time85%
FrontierCheapest$108Average$293FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$156Average$293FlexibilityNo cancel feeOn-time65%
DeltaCheapest$198Average$375FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$236Average$422FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$241Average$494FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$257Average$517FlexibilityNo cancel feeOn-time69%

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