$175+ 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 7/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — MIA
Jul 18 — Jul 251
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Seattle to Key Largo with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Key Largo are usually found in September or October, booked 33 days in advance, depart on a Tuesday or Thursday and return on a Wednesday
Cheap flight deals from Seattle to Key Largo
Cheapest
Best
Last-minute
One-way
Cheapest flights from Seattle to Key LargoExplore 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 June 18, 2026.
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 June 18, 2026.
This Frontier deal was found by Cheapflights users on 6/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/107:06 pm
SEA
- MIA
1 stop7h 45m
Frontier
Mon 7/1310:15 pm
MIA
- SEA
1 stop15h 24m
Frontier
Deal found 6/16![Frontier logo]()
$288
This Trip.com deal was found by Cheapflights users on 6/14. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/97:06 pm
SEA
- MIA
1 stop7h 45m
Frontier
Wed 7/1510:15 pm
MIA
- SEA
1 stop15h 24m
Frontier
Deal found 6/14![Frontier logo]()
$291
This CheapOair deal was found by Cheapflights users on 6/15. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/147:00 am
SEA
- MIA
1 stop19h 48m
Frontier
Thu 9/177:20 am
MIA
- SEA
1 stop20h 07m
Frontier
Deal found 6/15![Frontier logo]()
$298
This Expedia deal was found by Cheapflights users on 6/13. 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.
Tue 7/147:06 pm
SEA
- MIA
1 stop7h 45m
Frontier
Tue 7/2110:15 pm
MIA
- SEA
1 stop15h 24m
Frontier
Deal found 6/13![Frontier logo]()
$301
This Kiwi.com deal was found by Cheapflights users on 6/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/167:06 pm
SEA
- MIA
1 stop7h 45m
Frontier
Mon 7/206:00 am
MIA
- SEA
1 stop30h 17m
Frontier
Deal found 6/15![Frontier logo]()
$304
This Kiwi.com deal was found by Cheapflights users on 6/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/157:06 pm
SEA
- MIA
1 stop7h 45m
Frontier
Wed 7/226:00 am
MIA
- SEA
1 stop8h 20m
Frontier
Deal found 6/15![Frontier logo]()
$306
This Mytrip deal was found by Cheapflights users on 6/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/258:13 pm
SEA
- MIA
1 stop31h 17m
Frontier
Sat 8/110:15 pm
MIA
- SEA
1 stop15h 24m
Frontier
Deal found 6/15![Frontier logo]()
$308
This Frontier deal was found by Cheapflights users on 6/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/77:06 pm
SEA
- MIA
1 stop7h 45m
Frontier
Tue 8/1110:15 pm
MIA
- SEA
1 stop15h 53m
Frontier
Deal found 6/14![Frontier logo]()
$310
This Kiwi.com deal was found by Cheapflights users on 6/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/57:06 pm
SEA
- MIA
1 stop7h 45m
Frontier
Tue 8/1110:15 pm
MIA
- SEA
1 stop15h 53m
Frontier
Deal found 6/15![Frontier logo]()
$317
This Kiwi.com deal was found by Cheapflights users on 6/14. 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 8/47:06 pm
SEA
- MIA
1 stop7h 45m
Frontier
Tue 8/1110:15 pm
MIA
- SEA
1 stop15h 53m
Frontier
Deal found 6/14![Frontier logo]()
$318
Best flights from Seattle to Key LargoDiscover carefully curated flight deals from Seattle to Key Largo that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 18, 2026.
Discover carefully curated flight deals from Seattle to Key Largo that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 18, 2026.
This Delta deal was found by Cheapflights users on 6/14. 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 9/188:00 am
SEA
- MIA
Nonstop6h 09m
Delta
Sat 9/266:19 pm
MIA
- SEA
Nonstop6h 36m
Delta
Deal found 6/14![Delta logo]()
$347
This American Airlines deal was found by Cheapflights users on 6/18. 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.
Thu 11/510:35 am
SEA
- MIA
1 stop10h 00m
American Airlines
Wed 11/117:47 pm
MIA
- SEA
Nonstop6h 53m
American Airlines
Deal found 6/18![American Airlines logo]()
$357
This Priceline deal was found by Cheapflights users on 6/18. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/87:06 pm
SEA
- MIA
1 stop7h 45m
Multiple Airlines
Mon 7/136:20 pm
MIA
- SEA
Nonstop6h 40m
Multiple Airlines
Deal found 6/18![Multiple Airlines logo]()
$390
This Southwest deal was found by Cheapflights users on 6/17. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/15:00 am
SEA
- MIA
1 stop8h 45m
Southwest
Tue 10/61:35 pm
MIA
- SEA
2 stops11h 45m
Southwest
Deal found 6/17![Southwest logo]()
$392
This Alaska Airlines deal was found by Cheapflights users on 6/15. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/289:30 pm
SEA
- MIA
Nonstop6h 01m
Alaska Airlines
Mon 12/75:00 pm
MIA
- SEA
1 stop9h 00m
Alaska Airlines
Deal found 6/15![Alaska Airlines logo]()
$492
This Delta deal was found by Cheapflights users on 6/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/178:09 am
SEA
- MIA
Nonstop6h 07m
Delta
Tue 8/46:25 pm
MIA
- SEA
Nonstop6h 40m
Delta
Deal found 6/18![Delta logo]()
$389
This Delta deal was found by Cheapflights users on 6/16. 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.
Thu 10/88:25 am
SEA
- MIA
Nonstop6h 02m
Delta
Mon 10/126:05 pm
MIA
- SEA
Nonstop6h 53m
Delta
Deal found 6/16![Delta logo]()
$397
This Southwest deal was found by Cheapflights users on 6/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/277:30 pm
SEA
- MIA
2 stops12h 15m
Southwest
Tue 7/283:05 pm
MIA
- SEA
2 stops12h 40m
Southwest
Deal found 6/16![Southwest logo]()
$474
This Delta deal was found by Cheapflights users on 6/18. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/58:25 am
SEA
- MIA
Nonstop6h 02m
Delta
Wed 11/116:05 pm
MIA
- SEA
Nonstop6h 53m
Delta
Deal found 6/18![Delta logo]()
$402
This Southwest deal was found by Cheapflights users on 6/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/256:15 am
SEA
- MIA
2 stops10h 50m
Southwest
Thu 7/307:15 am
MIA
- SEA
1 stop9h 40m
Southwest
Deal found 6/16![Southwest logo]()
$500
Last-minute flights from Seattle to Key LargoDiscover last-minute flight deals from Seattle to Key Largo. Data last updated June 18, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Key Largo. Data last updated June 18, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 6/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/33:33 pm
SEA
- MIA
1 stop11h 21m
Frontier
Tue 7/1410:15 pm
MIA
- SEA
1 stop15h 24m
Frontier
Deal found 6/14![Frontier logo]()
$310
This Trip.com deal was found by Cheapflights users on 6/14. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/97:06 pm
SEA
- MIA
1 stop7h 45m
Frontier
Wed 7/1510:15 pm
MIA
- SEA
1 stop15h 24m
Frontier
Deal found 6/14![Frontier logo]()
$291
This Frontier deal was found by Cheapflights users on 6/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/107:06 pm
SEA
- MIA
1 stop7h 45m
Frontier
Mon 7/1310:15 pm
MIA
- SEA
1 stop15h 24m
Frontier
Deal found 6/16![Frontier logo]()
$288
This Expedia deal was found by Cheapflights users on 6/13. 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.
Tue 7/147:06 pm
SEA
- MIA
1 stop7h 45m
Frontier
Tue 7/2110:15 pm
MIA
- SEA
1 stop15h 24m
Frontier
Deal found 6/13![Frontier logo]()
$301
This Kiwi.com deal was found by Cheapflights users on 6/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/157:06 pm
SEA
- MIA
1 stop7h 45m
Frontier
Wed 7/226:00 am
MIA
- SEA
1 stop8h 20m
Frontier
Deal found 6/15![Frontier logo]()
$306
This Kiwi.com deal was found by Cheapflights users on 6/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/157:06 pm
SEA
- MIA
1 stop7h 45m
Frontier
Wed 7/296:00 am
MIA
- SEA
1 stop30h 17m
Frontier
Deal found 6/15![Frontier logo]()
$318
This Kiwi.com deal was found by Cheapflights users on 6/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/167:06 pm
SEA
- MIA
1 stop7h 45m
Frontier
Mon 7/206:00 am
MIA
- SEA
1 stop30h 17m
Frontier
Deal found 6/15![Frontier logo]()
$304
This Mytrip deal was found by Cheapflights users on 6/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/258:13 pm
SEA
- MIA
1 stop31h 17m
Frontier
Sat 8/110:15 pm
MIA
- SEA
1 stop15h 24m
Frontier
Deal found 6/15![Frontier logo]()
$308
This Frontier deal was found by Cheapflights users on 6/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2912:35 pm
SEA
- MIA
1 stop14h 16m
Frontier
Mon 8/36:00 am
MIA
- SEA
1 stop8h 20m
Frontier
Deal found 6/16![Frontier logo]()
$320
One-way flights from Seattle to Key LargoSearch for one-way flight options from Seattle to Key Largo. Find affordable one-way fares based on user searches. Data last updated June 18, 2026.
Search for one-way flight options from Seattle to Key Largo. Find affordable one-way fares based on user searches. Data last updated June 18, 2026.
This Frontier deal was found by Cheapflights users on 6/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/87:06 pm
SEA
- MIA
1 stop7h 45m
Frontier
Deal found 6/15![Frontier logo]()
$175
This Kiwi.com deal was found by Cheapflights users on 6/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/279:16 pm
SEA
- MIA
2 stops29h 32m
Frontier
Deal found 6/16![Frontier logo]()
$178
This Super.com deal was found by Cheapflights users on 6/15. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/263:19 pm
SEA
- MIA
1 stop11h 35m
Frontier
Deal found 6/15![Frontier logo]()
$179
This Frontier deal was found by Cheapflights users on 6/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/253:19 pm
SEA
- MIA
1 stop11h 35m
Frontier
Deal found 6/16![Frontier logo]()
$180
This Frontier deal was found by Cheapflights users on 6/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/67:06 pm
SEA
- MIA
1 stop7h 45m
Frontier
Deal found 6/16![Frontier logo]()
$184
This Expedia deal was found by Cheapflights users on 6/14. 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.
Tue 8/118:13 pm
SEA
- MIA
1 stop31h 17m
Frontier
Deal found 6/14![Frontier logo]()
$185
This Super.com deal was found by Cheapflights users on 6/15. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/108:53 pm
SEA
- MIA
1 stop30h 37m
Frontier
Deal found 6/15![Frontier logo]()
$189
This Frontier deal was found by Cheapflights users on 6/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/303:33 pm
SEA
- MIA
1 stop11h 21m
Frontier
Deal found 6/15![Frontier logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 6/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/117:00 am
SEA
- MIA
1 stop19h 48m
Frontier
Deal found 6/16![Frontier logo]()
$191
This Kiwi.com deal was found by Cheapflights users on 6/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/18:13 pm
SEA
- MIA
2 stops14h 40m
Frontier
Deal found 6/16![Frontier logo]()
$192
Find 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 June 18, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $288 (Frontier) |
One-way from | $175 (Frontier) |
Popular in | December |
Cheapest in | September |
Average price | $443 |
Cheapflights Fare Finder
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 June 18, 2026.
Use the filters below to find and compare flights from Seattle to Key Largo that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
SeattleMiami
SEA - MIA
SEAMIA
Seattle/Tacoma Intl
Fri 9/18
8:00 am-5:09 pm
Nonstop6h 09m
Miami
Sat 9/26
6:19 pm-9:55 pm
Nonstop6h 36m
$347
SeattleMiami
SEA - MIA
SEAMIA
Seattle/Tacoma Intl
Thu 11/5
10:35 am-11:35 pm
1 stop10h 00m
Miami
Wed 11/11
7:47 pm-11:40 pm
Nonstop6h 53m
$357
SeattleMiami
SEA - MIA
SEAMIA
Seattle/Tacoma Intl
Fri 7/17
8:09 am-5:16 pm
Nonstop6h 07m
Miami
Tue 8/4
6:25 pm-10:05 pm
Nonstop6h 40m
$389
SeattleMiami
SEA - MIA
SEAMIA
Seattle/Tacoma Intl
Wed 7/8
7:06 pm-5:51 am
1 stop7h 45m
Miami
Mon 7/13
6:20 pm-10:00 pm
Nonstop6h 40m
$390
SeattleMiami
SEA - MIA
SEAMIA
Seattle/Tacoma Intl
Thu 10/1
5:00 am-4:45 pm
1 stop8h 45m
Miami
Tue 10/6
1:35 pm-10:20 pm
2 stops11h 45m
$392
SeattleMiami
SEA - MIA
SEAMIA
Seattle/Tacoma Intl
Thu 10/8
8:25 am-5:27 pm
Nonstop6h 02m
Miami
Mon 10/12
6:05 pm-9:58 pm
Nonstop6h 53m
$397
SeattleMiami
SEA - MIA
SEAMIA
Seattle/Tacoma Intl
Thu 11/5
8:25 am-5:27 pm
Nonstop6h 02m
Miami
Wed 11/11
6:05 pm-9:58 pm
Nonstop6h 53m
$402
SeattleMiami
SEA - MIA
SEAMIA
Seattle/Tacoma Intl
Mon 7/27
7:30 pm-10:45 am
2 stops12h 15m
Miami
Tue 7/28
3:05 pm-12:45 am
2 stops12h 40m
$474
SeattleMiami
SEA - MIA
SEAMIA
Seattle/Tacoma Intl
Sat 11/28
9:30 pm-6:31 am
Nonstop6h 01m
Miami
Mon 12/7
5:00 pm-11:00 pm
1 stop9h 00m
$492
SeattleMiami
SEA - MIA
SEAMIA
Seattle/Tacoma Intl
Sat 7/25
6:15 am-8:05 pm
2 stops10h 50m
Miami
Thu 7/30
7:15 am-1:55 pm
1 stop9h 40m
$500
Showing 1-10 of 21 resultsSorted by cheapest first
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.
SEA-MIA
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 Seattle to Key Largo
SEA-KE9
SEA-MIA
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 June 18, 2026.
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.
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 June 18, 2026.
The most flights from SEA to KE9 are scheduled on a Thursday (7 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (4 on average).
How much does it cost to fly round-trip from Seattle to Key Largo?
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 June 18, 2026.
See what other customers who have flown with Alaska Airlines,Delta, andHawaiian Airlines from Seattle to Key Largo have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Entertainment
7.0
Crew
8.5
Overall
7.9
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Food
7.0
Entertainment
7.0
Crew
8.5
Overall
7.9
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Food
7.0
Entertainment
7.0
Crew
8.5
Overall
7.9
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Food
7.0
Entertainment
7.0
Crew
8.5
Overall
7.9
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Food
7.0
Entertainment
7.0
Crew
8.5
Overall
7.9
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
Food
7.0
Entertainment
7.0
Crew
8.5
Overall
7.9
Boarding
8.1
Comfort
7.8
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
SEA - RNO
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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from Seattle
Popular flights
Top destinations
Alternative routes for Seattle to Key Largo
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Key Largo by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Seattle to Key Largo by cabin class
Find flights from Seattle to Key Largo, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Seattle and Key Largo flights
Browse other Seattle and Key Largo flight options. Last updated on June 18, 2026.
Other flights from Seattle
Browse through other flights departing from Seattle. Flights are based on user searches made on Cheapflights and were last updated on June 18, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Seattle to Key Largo flights
Consider these flights traveling from Seattle to Key Largo.
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 June 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$118 | Average$300 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$143 | Average$288 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$152 | Average$337 | FlexibilityNo cancel fee | On-time83% | |
| Cheapest$159 | Average$460 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$198 | Average$387 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$199 | Average$436 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$205 | Average$502 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$248 | Average$485 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$258 | Average$350 | FlexibilityNo cancel fee | On-time62% |