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$127+ 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 3/25. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — SEA
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
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The best prices from Key Largo to Seattle/Tacoma Intl are usually found in January or October, booked 79 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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$160
(CheapOair)

One-way from

$127
(Mytrip)

Popular in

June

Cheapest in

January

Average price

$368
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 ($63 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in February 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 February 20, 2025.

This CheapOair deal was found by Cheapflights users on 2/20. 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.
Thu 5/16:00 amMIA - SEA
1 stop21h 44mFrontier
Sat 5/176:00 amSEA - MIA
1 stop20h 22mFrontier
Deal found 2/20$160
This eDestinos deal was found by Cheapflights users on 2/20. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/137:15 amMIA - SEA
2 stops14h 47mSpirit Airlines
Tue 3/187:57 pmSEA - MIA
2 stops10h 25mSpirit Airlines
Deal found 2/20$161
This eDestinos deal was found by Cheapflights users on 2/20. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/135:55 pmMIA - SEA
Nonstop7h 05mMultiple Airlines
Tue 3/187:57 pmSEA - MIA
2 stops10h 25mMultiple Airlines
Deal found 2/20$177
This Delta deal was found by Cheapflights users on 2/20. 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.
Fri 3/215:45 pmMIA - SEA
Nonstop6h 56mDelta
Tue 4/17:35 amSEA - MIA
Nonstop5h 57mDelta
Deal found 2/20$197
This Alaska Airlines deal was found by Cheapflights users on 2/20. 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.
Wed 3/125:55 pmMIA - SEA
Nonstop7h 05mAlaska Airlines
Sun 3/169:59 pmSEA - MIA
1 stop17h 48mAlaska Airlines
Deal found 2/20$227
This American Airlines deal was found by Cheapflights users on 2/20. 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.
Thu 5/87:30 pmMIA - SEA
Nonstop6h 34mAmerican Airlines
Wed 5/1412:24 amSEA - MIA
Nonstop5h 46mAmerican Airlines
Deal found 2/20$267
This United Airlines deal was found by Cheapflights users on 2/20. 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.
Thu 5/85:00 pmMIA - SEA
1 stop8h 50mUnited Airlines
Thu 5/156:15 amSEA - MIA
2 stops13h 14mUnited Airlines
Deal found 2/20$341
This Hawaiian Airlines deal was found by Cheapflights users on 2/19. 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.
Thu 3/65:55 pmMIA - SEA
Nonstop7h 05mHawaiian Airlines
Tue 3/118:05 amSEA - MIA
1 stop7h 42mHawaiian Airlines
Deal found 2/19$387
This Sun Country Air deal was found by Cheapflights users on 2/20. 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/512:10 pmMIA - SEA
1 stop13h 40mSun Country Air
Fri 7/2511:59 pmSEA - MIA
1 stop8h 11mSun Country Air
Deal found 2/20$405

Find flights from Key Largo to Seattle within your budget

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 February 20, 2025.

Fly from

Key Largo

Fly to

Seattle

Route

Depart

Return

Price

MiamiSeattle

MIA - SEA

MIASEA

Miami

Thu 5/1

6:00 am-12:44 am

1 stop21h 44m

Seattle/Tacoma Intl

Sat 5/17

6:00 am-5:22 am

1 stop20h 22m

$160

MiamiSeattle

MIA - SEA

MIASEA

Miami

Thu 3/13

7:15 am-7:02 pm

2 stops14h 47m

Seattle/Tacoma Intl

Tue 3/18

7:57 pm-9:22 am

2 stops10h 25m

$161

MiamiSeattle

MIA - SEA

MIASEA

Miami

Thu 3/13

5:55 pm-10:00 pm

Nonstop7h 05m

Seattle/Tacoma Intl

Tue 3/18

7:57 pm-9:22 am

2 stops10h 25m

$177

MiamiSeattle

MIA - SEA

MIASEA

Miami

Fri 3/21

5:45 pm-9:41 pm

Nonstop6h 56m

Seattle/Tacoma Intl

Mon 3/24

7:35 am-4:32 pm

Nonstop5h 57m

$197

MiamiSeattle

MIA - SEA

MIASEA

Miami

Wed 3/12

5:55 pm-10:00 pm

Nonstop7h 05m

Seattle/Tacoma Intl

Sun 3/16

9:59 pm-6:47 pm

1 stop17h 48m

$227

MiamiSeattle

MIA - SEA

MIASEA

Miami

Thu 5/8

7:30 pm-11:04 pm

Nonstop6h 34m

Seattle/Tacoma Intl

Wed 5/14

12:24 am-9:10 am

Nonstop5h 46m

$267

MiamiSeattle

MIA - SEA

MIASEA

Miami

Thu 5/8

5:00 pm-10:50 pm

1 stop8h 50m

Seattle/Tacoma Intl

Thu 5/15

6:15 am-10:29 pm

2 stops13h 14m

$341

MiamiSeattle

MIA - SEA

MIASEA

Miami

Thu 3/6

5:55 pm-10:00 pm

Nonstop7h 05m

Seattle/Tacoma Intl

Tue 3/11

8:05 am-6:47 pm

1 stop7h 42m

$387

MiamiSeattle

MIA - SEA

MIASEA

Miami

Sat 7/5

12:10 pm-10:50 pm

1 stop13h 40m

Seattle/Tacoma Intl

Fri 7/25

11:59 pm-11:10 am

1 stop8h 11m

$405

MiamiSeattle

MIA - SEA

MIASEA

Miami

Thu 3/27

7:20 am-8:43 am

1 stop28h 23m

$127

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 18 results
1
2

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.

Travel insights for flights from Key Largo to Seattle

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

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 February 14, 2025.

To ensure you get the cheapest price possible for a flight from Key Largo to Seattle, you should look to book at least 79 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 February 20, 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 February 25, 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 February 20, 2025.

The most flights from KE9 to SEA are scheduled on a Tuesday (8 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (7 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 February 20, 2025.
Read reviews from past customers who have flown Alaska Airlines, Delta and Hawaiian Airlines 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
9,692 reviews

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Entertainment

7.1

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
9,692 reviews
Alaska Airlines
8.0
Very good
9,692 reviews

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Entertainment

7.1

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
8,220 reviews
Alaska Airlines
8.0
Very good
9,692 reviews

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Entertainment

7.1

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
2,317 reviews
Alaska Airlines
8.0
Very good
9,692 reviews

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Entertainment

7.1

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
8,766 reviews
Alaska Airlines
8.0
Very good
9,692 reviews

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Entertainment

7.1

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

American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,692 reviews

Comfort

7.9

Overall

8.0

Crew

8.5

Food

7.1

Boarding

8.2

Entertainment

7.1

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 7 inbound flights from Key Largo per day.

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

    Within the past month, 21 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?

    $127 is the cheapest one-way deal found within the past few days, from Spirit Airlines. You may also be able to find cheap deals on United Airlines and Hawaiian Airlines, with prices starting from $129 and $139, 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 Hawaiian Airlines (82%), Alaska Airlines (80%) or American Airlines (79%) 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 $768, our data indicates the cheapest price to be $108. The most popular route (Miami - Seattle/Tacoma Intl), is priced around $174.

  • 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
Renton
Tacoma
Lacey
Ocean Shores
Leavenworth
Olympia
Federal Way
Centralia
Marysville
Cle Elum
Mukilteo
Aberdeen
Lakewood
Issaquah
Shoreline
Lynnwood
Shelton
Silverdale

Browse thousands of different options on Cheapflights for your next trip

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Top 6 airlines flying from Key Largo to Seattle

Discover the top 6 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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$149Average$320FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$156Average$296FlexibilityNo cancel feeOn-time65%
DeltaCheapest$200Average$395FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$222Average$428FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$256Average$518FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$261Average$547FlexibilityNo cancel feeOn-time69%
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