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Key Largo

$127+ 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 3/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — MIA
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
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 58 days in advance, depart on a Wednesday or Monday and return on a Wednesday

Cheap flight deals from Seattle to Key Largo

Keep the following information in mind while searching for Seattle to Key Largo flight deals. Data was last updated February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$200
(FlightHub)

One-way from

$128
(Alaska Airlines)

Popular in

December

Cheapest in

January

Average price

$387
Provider with most accurate pricing for Seattle/Tacoma Intl-Miami flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Miami flights.
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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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Highest demand for flights based on searches. 3% potential increase in price ($14 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($12 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 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 February 20, 2025.

This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/19:48 amSEA - MIA
1 stop17h 27mSpirit Airlines
Wed 4/97:22 amMIA - SEA
1 stop15h 39mSpirit Airlines
Deal found 2/19$200
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/228:01 amSEA - MIA
Nonstop6h 00mMultiple Airlines
Tue 4/296:00 amMIA - SEA
1 stop21h 44mMultiple Airlines
Deal found 2/20$201
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/92:02 pmSEA - MIA
1 stop12h 14mFrontier
Sat 3/152:56 pmMIA - SEA
1 stop24h 06mFrontier
Deal found 2/20$203
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.
Mon 3/178:05 amSEA - MIA
1 stop7h 42mAlaska Airlines
Tue 3/256:02 pmMIA - SEA
Nonstop6h 57mAlaska Airlines
Deal found 2/20$227
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/127:35 amSEA - MIA
Nonstop5h 57mDelta
Tue 3/185:45 pmMIA - SEA
Nonstop6h 56mDelta
Deal found 2/19$237
This American Airlines deal was found by Cheapflights users on 2/18. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/1112:59 amSEA - MIA
1 stop10h 12mAmerican Airlines
Tue 3/187:35 pmMIA - SEA
Nonstop6h 51mAmerican Airlines
Deal found 2/18$303

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 February 20, 2025.

Fly from

Seattle

Fly to

Key Largo

Route

Depart

Return

Price

SeattleMiami

SEA - MIA

SEAMIA

Seattle/Tacoma Intl

Fri 4/18

4:26 pm-10:00 am

1 stop14h 34m

Miami

Mon 4/21

6:21 am-12:44 am

1 stop21h 23m

$200

SeattleMiami

SEA - MIA

SEAMIA

Seattle/Tacoma Intl

Tue 4/22

8:01 am-5:01 pm

Nonstop6h 00m

Miami

Tue 4/29

6:00 am-12:44 am

1 stop21h 44m

$201

SeattleMiami

SEA - MIA

SEAMIA

Seattle/Tacoma Intl

Mon 3/17

7:57 pm-7:42 pm

2 stops20h 45m

Miami

Tue 3/25

9:40 pm-7:09 pm

2 stops24h 29m

$202

SeattleMiami

SEA - MIA

SEAMIA

Seattle/Tacoma Intl

Mon 3/17

6:42 am-6:47 pm

1 stop9h 05m

Miami

Tue 3/25

6:02 pm-9:59 pm

Nonstop6h 57m

$220

SeattleMiami

SEA - MIA

SEAMIA

Seattle/Tacoma Intl

Mon 3/17

6:42 am-6:47 pm

1 stop9h 05m

Miami

Wed 3/26

6:02 pm-9:59 pm

Nonstop6h 57m

$227

SeattleMiami

SEA - MIA

SEAMIA

Seattle/Tacoma Intl

Wed 3/12

7:35 am-4:32 pm

Nonstop5h 57m

Miami

Wed 3/19

5:45 pm-9:41 pm

Nonstop6h 56m

$247

SeattleMiami

SEA - MIA

SEAMIA

Seattle/Tacoma Intl

Fri 4/25

12:59 am-12:41 pm

1 stop8h 42m

Miami

Tue 4/29

7:47 pm-11:39 pm

Nonstop6h 52m

$328

SeattleMiami

SEA - MIA

SEAMIA

Seattle/Tacoma Intl

Sun 3/16

7:10 pm-5:54 am

1 stop7h 44m

Miami

Tue 3/25

10:20 am-9:01 pm

2 stops13h 41m

$363

SeattleMiami

SEA - MIA

SEAMIA

Seattle/Tacoma Intl

Mon 3/10

12:41 pm-6:05 pm

2 stops26h 24m

$127

SeattleMiami

SEA - MIA

SEAMIA

Seattle/Tacoma Intl

Sun 3/2

11:30 pm-11:47 pm

1 stop21h 17m

$133

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 18 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 February 14, 2025.

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 58 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 $231). Flying from Seattle to Key Largo in March is currently the most expensive (average of $289). 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 February 20, 2025.

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 February 20, 2025.

The most flights from SEA to KE9 are scheduled on a Tuesday (7 on average). You will have fewer flight options on Monday, 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 February 20, 2025.
Read reviews from past customers who have flown Southwest, Alaska Airlines and Delta 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
4,411 reviews

Comfort

8.1

Entertainment

7.6

Food

7.1

Overall

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Southwest
8.1
Very good
4,411 reviews
Southwest
8.1
Very good
4,411 reviews

Comfort

8.1

Entertainment

7.6

Food

7.1

Overall

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Alaska Airlines
8.0
Very good
9,697 reviews
Southwest
8.1
Very good
4,411 reviews

Comfort

8.1

Entertainment

7.6

Food

7.1

Overall

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Delta
8.0
Very good
8,219 reviews
Southwest
8.1
Very good
4,411 reviews

Comfort

8.1

Entertainment

7.6

Food

7.1

Overall

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Hawaiian Airlines
7.9
Good
2,317 reviews
Southwest
8.1
Very good
4,411 reviews

Comfort

8.1

Entertainment

7.6

Food

7.1

Overall

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

JetBlue
7.4
Good
3,070 reviews
Southwest
8.1
Very good
4,411 reviews

Comfort

8.1

Entertainment

7.6

Food

7.1

Overall

8.1

Crew

8.7

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

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 6 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 45 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?

    $128 is the cheapest one-way deal found within the past few days, from Alaska Airlines. You may also be able to find cheap deals on United Airlines and Spirit Airlines, with prices starting from $129 and $132, 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: Hawaiian Airlines (93%), Alaska Airlines (91%), Air Tahiti Nui( 90%).

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

    The cheapest flight price from Seattle to Key Largo is $138. On average you can expect to pay $895. The most popular route, (Seattle/Tacoma Intl - Miami), can usually be booked for $155.

  • 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 $231). Flying from Seattle to Key Largo in March is currently the most expensive (average of $289). 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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$121Average$253FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$127Average$280FlexibilityNo cancel feeOn-time65%
FrontierCheapest$129Average$287FlexibilityNo cancel feeOn-time62%
Sun Country AirCheapest$157Average$355FlexibilityNo cancel feeOn-time83%
Alaska AirlinesCheapest$212Average$481FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$218Average$546FlexibilityNo cancel feeOn-time71%
DeltaCheapest$225Average$572FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$256Average$499FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$386Average$511FlexibilityNo cancel feeOn-time63%
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