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Key Largo

$129+ Cheap flights from Seattle (SEA) to Key Largo, FL

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 1/19. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — MIA
Dec 25 — Jan 11
Wed 12/25
Wed 1/1
1 adult, Economy
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The best prices from Seattle/Tacoma Intl to Key Largo are usually found in January or September, booked 60 days in advance, depart on a Tuesday or Wednesday and return on a Thursday

Cheap flight deals from Seattle to Key Largo

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Key Largo (KE9). 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 December 20, 2024.

Round-trip from

$257
(Delta)

One-way from

$129
(Delta)

Popular in

December

Cheapest in

January

Average price

$538
From Seattle/Tacoma Intl to Key Largo
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One-way flight from Seattle/Tacoma Intl to Key Largo
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High demand for flights, 0% potential price rise
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Best time to find cheap flights, 2% potential price drop
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Average for round-trip flights in December 2024
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Find flight deals from Seattle to Key Largo

Cheapest flights from Seattle to Key Largo
Explore the most affordable flight options available from Seattle to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 20, 2024.

This Gotogate deal was found by Cheapflights users on 12/19. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/316:34 pmSEA - MIA
1 stop13h 32mMultiple Airlines
Fri 1/106:00 amMIA - SEA
1 stop11h 19mMultiple Airlines
Deal found 12/19$277
This American Airlines deal was found by Cheapflights users on 12/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/311:13 pmSEA - MIA
Nonstop5h 48mAmerican Airlines
Fri 1/107:30 pmMIA - SEA
Nonstop6h 56mAmerican Airlines
Deal found 12/19$372
This Delta deal was found by Cheapflights users on 12/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/297:25 amSEA - MIA
Nonstop5h 54mDelta
Tue 1/215:15 pmMIA - SEA
Nonstop7h 04mDelta
Deal found 12/19$507
This Mytrip deal was found by Cheapflights users on 12/19. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/316:11 amSEA - MIA
2 stops22h 18mSpirit Airlines
Fri 1/105:45 amMIA - SEA
3 stops21h 34mSpirit Airlines
Deal found 12/19$528
This Sun Country Air deal was found by Cheapflights users on 12/19. 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/276:40 pmSEA - MIA
1 stop13h 32mSun Country Air
Mon 12/302:25 pmMIA - SEA
1 stop11h 18mSun Country Air
Deal found 12/19$580
This FlightHub deal was found by Cheapflights users on 12/19. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/309:36 pmSEA - MIA
1 stop28h 24mFrontier
Mon 1/66:00 amMIA - SEA
1 stop10h 10mFrontier
Deal found 12/19$583
This Alaska Airlines deal was found by Cheapflights users on 12/18. 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 12/256:40 amSEA - MIA
1 stop8h 15mAlaska Airlines
Wed 1/17:07 pmMIA - SEA
1 stop13h 57mAlaska Airlines
Deal found 12/18$616
This United Airlines deal was found by Cheapflights users on 12/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/296:13 pmSEA - MIA
2 stops13h 40mUnited Airlines
Tue 1/216:25 amMIA - SEA
3 stops17h 55mUnited Airlines
Deal found 12/19$641

Find flights from Seattle to Key Largo within your budget

Customize your flight search to find flights from Seattle to Key Largo 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 December 20, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

SeattleMiami

SEA - MIA

SEAMIA

Seattle/Tacoma Intl

Mon 1/13

7:15 am-4:05 pm

Nonstop5h 50m

Miami

Fri 1/17

5:15 pm-9:19 pm

Nonstop7h 04m

$257

SeattleMiami

SEA - MIA

SEAMIA

Seattle/Tacoma Intl

Mon 1/20

5:55 pm-1:00 pm

2 stops16h 05m

Miami

Thu 1/23

6:00 am-3:35 pm

1 stop12h 35m

$258

SeattleMiami

SEA - MIA

SEAMIA

Seattle/Tacoma Intl

Sat 1/18

9:45 am-9:47 pm

1 stop9h 02m

Miami

Tue 1/21

5:45 am-5:00 pm

2 stops14h 15m

$259

SeattleMiami

SEA - MIA

SEAMIA

Seattle/Tacoma Intl

Thu 2/20

2:02 pm-5:16 am

1 stop12h 14m

Miami

Wed 2/26

6:25 am-12:36 pm

1 stop9h 11m

$261

SeattleMiami

SEA - MIA

SEAMIA

Seattle/Tacoma Intl

Mon 1/20

7:42 am-6:15 pm

1 stop7h 33m

Miami

Thu 1/23

5:55 pm-9:52 pm

Nonstop6h 57m

$266

SeattleMiami

SEA - MIA

SEAMIA

Seattle/Tacoma Intl

Tue 2/4

7:00 am-8:22 pm

1 stop10h 22m

Miami

Tue 3/11

4:48 pm-10:49 pm

1 stop9h 01m

$276

SeattleMiami

SEA - MIA

SEAMIA

Seattle/Tacoma Intl

Sun 1/19

10:17 pm-7:00 am

Nonstop5h 43m

Miami

Tue 1/28

3:13 pm-9:18 pm

1 stop9h 05m

$307

SeattleMiami

SEA - MIA

SEAMIA

Seattle/Tacoma Intl

Sun 1/19

7:15 am-4:05 pm

Nonstop5h 50m

$129

SeattleMiami

SEA - MIA

SEAMIA

Seattle/Tacoma Intl

Mon 1/6

2:16 pm-7:29 am

1 stop14h 13m

$131

SeattleMiami

SEA - MIA

SEAMIA

Seattle/Tacoma Intl

Sun 2/23

8:05 am-6:47 pm

1 stop7h 42m

$138

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/19

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

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

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

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

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Key Largo. Price data was last updated on December 13, 2024.

The price you pay for your flight from Seattle to Key Largo may vary depending on when you book. For the best chance of a lower fare, look to book 60 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, September is the cheapest month in which you can book a flight from Seattle to Key Largo (average of $218). Flying from Seattle to Key Largo in March is currently the most expensive (average of $286). 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 KE9?

Find hourly flight availability from Seattle to Key Largo. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 20, 2024.

When flying from Seattle to Key Largo, 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 Seattle to Key Largo?

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

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

Weekly flight availability from Seattle to Key Largo

Explore weekly flight availability from Seattle to Key Largo. 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 December 20, 2024.

The most flights from SEA to KE9 are scheduled on a Thursday (13 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (4 on average).

Rainfall in Key Largo by month

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

In terms of precipitation, rainfall in Key Largo ranges from 1.6 - 9.9 inches per month. September is typically the wettest month, when rainfall can reach 9.9 in. January is typically the driest time to visit Key Largo when rainfall is around 1.6 in.

Temperature in Key Largo by month

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

If weather is an important factor for your trip to Key Largo, 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 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 68.0 F).

Reviews of airlines servicing Key Largo

Get insights into the airlines that provide service to Key Largo. 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 Largo. Reviews last updated December 20, 2024.
Read reviews from past customers who have flown Delta, Spirit Airlines and Frontier from Seattle to Key Largo. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,821 reviews

Comfort

8.1

Boarding

8.2

Food

7.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,821 reviews
Southwest
8.1
Very good
4,821 reviews

Comfort

8.1

Boarding

8.2

Food

7.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,547 reviews
Southwest
8.1
Very good
4,821 reviews

Comfort

8.1

Boarding

8.2

Food

7.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,601 reviews
Southwest
8.1
Very good
4,821 reviews

Comfort

8.1

Boarding

8.2

Food

7.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
9,041 reviews
Southwest
8.1
Very good
4,821 reviews

Comfort

8.1

Boarding

8.2

Food

7.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,821 reviews

Comfort

8.1

Boarding

8.2

Food

7.2

Crew

8.7

Entertainment

7.7

Overall

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Key Largo. 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 from for flights from Seattle to Key Largo?

    Seattle/Tacoma Intl (SEA) is the airport you will fly out of if you book a flight from Seattle to Key Largo. You should not have trouble finding flights to Key Largo from Seattle/Tacoma Intl; the airport handles an average of 7 outbound flights to Key Largo per day. You should also have plenty of airline options to choose from since 9 airlines have flights from the Seattle airport to Key Largo. It is only a 11.4 mi journey to Seattle/Tacoma Intl (SEA) from Seattle’s city center.

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

    The Seattle/Tacoma Intl to Key Largo flight path was viewed by 39 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    $129 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on Spirit Airlines and Alaska Airlines, with prices starting from $131 and $138, respectively.

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

    Before booking your flight to Key Largo from Seattle, check out the most reliable airlines to get you to your destination on time: American Airlines (90%), Alaska Airlines (90%), Hawaiian Airlines( 90%).

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

    The cheapest flight price from Seattle to Key Largo is $128. On average you can expect to pay $1,028. The most popular route, (Seattle/Tacoma Intl - Miami), can usually be booked for $157.

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

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

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

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

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

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

    Currently, September is the cheapest month in which you can book a flight from Seattle to Key Largo (average of $218). Flying from Seattle to Key Largo in March is currently the most expensive (average of $286). 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 9 airlines flying from Seattle to Key Largo

Discover the top 9 airlines that operate flights from Seattle to Key Largo. 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 December 20, 2024.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$121Average$253FlexibilityNo cancel feeOn-time62%
Sun Country AirCheapest$122Average$307FlexibilityNo cancel feeOn-time83%
Spirit AirlinesCheapest$127Average$284FlexibilityNo cancel feeOn-time65%
FrontierCheapest$129Average$268FlexibilityNo cancel feeOn-time62%
Alaska AirlinesCheapest$186Average$459FlexibilityNo cancel feeOn-time75%
DeltaCheapest$212Average$578FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$221Average$546FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$253Average$535FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$386Average$471FlexibilityNo cancel feeOn-time63%
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