$141+ 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 3/5. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — SEA
Mar 15 — Mar 221
1 adult, Economy
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Find cheap flights from Key Largo to Seattle 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 Key Largo to Seattle/Tacoma Intl are usually found in October or May, booked 87 days in advance, depart on a Wednesday or Friday and return on a Thursday
Cheap flight deals from Key Largo to Seattle
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Best
Last-minute
One-way
Cheapest flights from Key Largo to SeattleExplore 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 13, 2026.
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 13, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 4/308:42 am
MIA
- SEA
1 stop14h 38m
Multiple Airlines
Sun 5/109:35 pm
SEA
- MIA
2 stops34h 15m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$191
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 4/168:42 am
MIA
- SEA
1 stop14h 38m
Frontier
Mon 4/209:35 pm
SEA
- MIA
2 stops28h 30m
Frontier
Deal found 2/10![Frontier logo]()
$192
This Kiwi.com deal was found by Cheapflights users on 2/12. 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 4/175:50 am
MIA
- SEA
1 stop12h 15m
Frontier
Sun 4/269:35 pm
SEA
- MIA
1 stop30h 57m
Frontier
Deal found 2/12![Frontier logo]()
$194
This Kiwi.com deal was found by Cheapflights users on 2/9. 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 4/147:50 am
MIA
- SEA
1 stop28h 37m
Frontier
Sun 4/196:57 pm
SEA
- MIA
1 stop31h 08m
Frontier
Deal found 2/9![Frontier logo]()
$195
This Delta deal was found by Cheapflights users on 2/12. 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 4/165:25 pm
MIA
- SEA
Nonstop6h 40m
Delta
Mon 4/277:15 am
SEA
- MIA
Nonstop5h 56m
Delta
Deal found 2/12![Delta logo]()
$197
This eDestinos deal was found by Cheapflights users on 2/11. 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.
Tue 4/217:50 am
MIA
- SEA
1 stop28h 37m
Frontier
Fri 4/244:20 pm
SEA
- MIA
1 stop9h 45m
Frontier
Deal found 2/11![Frontier logo]()
$199
This Frontier deal was found by Cheapflights users on 2/10. 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 4/245:50 am
MIA
- SEA
1 stop12h 15m
Frontier
Mon 4/274:20 pm
SEA
- MIA
1 stop9h 45m
Frontier
Deal found 2/10![Frontier logo]()
$200
This Frontier deal was found by Cheapflights users on 2/11. 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.
Mon 4/208:42 am
MIA
- SEA
1 stop14h 38m
Frontier
Fri 4/244:20 pm
SEA
- MIA
1 stop9h 45m
Frontier
Deal found 2/11![Frontier logo]()
$201
This SmartFares deal was found by Cheapflights users on 2/13. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/196:00 pm
MIA
- SEA
Nonstop6h 49m
Alaska Airlines
Wed 6/38:10 am
SEA
- MIA
Nonstop6h 07m
Alaska Airlines
Deal found 2/13![Alaska Airlines logo]()
$205
Best flights from Key Largo to SeattleDiscover carefully curated flight deals from Key Largo to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 13, 2026.
Discover carefully curated flight deals from Key Largo to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 13, 2026.
This Delta deal was found by Cheapflights users on 2/12. 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 3/56:29 pm
MIA
- SEA
Nonstop6h 46m
Delta
Wed 3/118:00 am
SEA
- MIA
Nonstop5h 46m
Delta
Deal found 2/12![Delta logo]()
$197
This United Airlines deal was found by Cheapflights users on 2/11. 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.
Tue 4/219:00 am
MIA
- SEA
2 stops12h 35m
United Airlines
Tue 4/285:00 am
SEA
- MIA
1 stop7h 38m
United Airlines
Deal found 2/11![United Airlines logo]()
$262
This Delta deal was found by Cheapflights users on 2/12. 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.
Tue 3/243:33 pm
MIA
- SEA
1 stop9h 32m
Delta
Tue 3/317:35 pm
SEA
- MIA
1 stop7h 15m
Delta
Deal found 2/12![Delta logo]()
$217
This Delta deal was found by Cheapflights users on 2/12. 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 5/78:00 am
MIA
- SEA
1 stop11h 48m
Delta
Sat 5/165:30 am
SEA
- MIA
1 stop9h 11m
Delta
Deal found 2/12![Delta logo]()
$217
This Delta deal was found by Cheapflights users on 2/12. 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 5/208:00 am
MIA
- SEA
1 stop11h 48m
Delta
Wed 6/38:00 am
SEA
- MIA
Nonstop6h 02m
Delta
Deal found 2/12![Delta logo]()
$227
This Delta deal was found by Cheapflights users on 2/12. 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 5/148:00 am
MIA
- SEA
1 stop9h 51m
Delta
Wed 6/38:00 am
SEA
- MIA
Nonstop6h 02m
Delta
Deal found 2/12![Delta logo]()
$227
This Delta deal was found by Cheapflights users on 2/11. 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 5/156:15 pm
MIA
- SEA
Nonstop6h 50m
Delta
Sun 5/248:00 am
SEA
- MIA
Nonstop6h 04m
Delta
Deal found 2/11![Delta logo]()
$237
This Delta deal was found by Cheapflights users on 2/12. 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 3/195:56 pm
MIA
- SEA
Nonstop6h 52m
Delta
Sun 4/197:15 am
SEA
- MIA
Nonstop5h 56m
Delta
Deal found 2/12![Delta logo]()
$237
This Delta deal was found by Cheapflights users on 2/11. 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.
Tue 4/215:25 pm
MIA
- SEA
Nonstop6h 40m
Delta
Tue 4/287:15 am
SEA
- MIA
Nonstop5h 56m
Delta
Deal found 2/11![Delta logo]()
$247
This Delta deal was found by Cheapflights users on 2/9. 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 4/305:25 pm
MIA
- SEA
Nonstop6h 40m
Delta
Sat 5/98:00 am
SEA
- MIA
Nonstop6h 04m
Delta
Deal found 2/9![Delta logo]()
$257
This Delta deal was found by Cheapflights users on 2/12. 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.
Mon 5/186:15 pm
MIA
- SEA
Nonstop6h 50m
Delta
Sat 6/68:00 am
SEA
- MIA
Nonstop6h 02m
Delta
Deal found 2/12![Delta logo]()
$267
This Delta deal was found by Cheapflights users on 2/12. 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.
Sat 5/166:15 pm
MIA
- SEA
Nonstop6h 50m
Delta
Mon 6/88:25 am
SEA
- MIA
Nonstop6h 07m
Delta
Deal found 2/12![Delta logo]()
$267
Last-minute flights from Key Largo to SeattleDiscover last-minute flight deals from Key Largo to Seattle. Data last updated February 13, 2026 and is based on user searches.
Discover last-minute flight deals from Key Largo to Seattle. Data last updated February 13, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 2/11. 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 2/266:45 am
MIA
- SEA
1 stop31h 10m
Frontier
Mon 3/212:30 pm
SEA
- MIA
1 stop13h 44m
Frontier
Deal found 2/11![Frontier logo]()
$253
This Delta deal was found by Cheapflights users on 2/12. 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 3/56:29 pm
MIA
- SEA
Nonstop6h 46m
Delta
Wed 3/118:00 am
SEA
- MIA
Nonstop5h 46m
Delta
Deal found 2/12![Delta logo]()
$197
This Expedia deal was found by Cheapflights users on 2/10. 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.
Fri 3/65:50 am
MIA
- SEA
1 stop8h 29m
Frontier
Sun 3/812:24 pm
SEA
- MIA
1 stop14h 14m
Frontier
Deal found 2/10![Frontier logo]()
$250
This Delta deal was found by Cheapflights users on 2/9. 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 3/66:34 pm
MIA
- SEA
Nonstop6h 56m
Delta
Sun 3/158:00 am
SEA
- MIA
Nonstop5h 46m
Delta
Deal found 2/9![Delta logo]()
$267
This Southwest deal was found by Cheapflights users on 2/12. 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 3/711:45 am
MIA
- SEA
1 stop10h 30m
Southwest
Mon 3/165:30 am
SEA
- MIA
1 stop10h 30m
Southwest
Deal found 2/12![Southwest logo]()
$222
This Delta deal was found by Cheapflights users on 2/9. 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 3/115:56 pm
MIA
- SEA
Nonstop6h 52m
Delta
Wed 3/188:00 am
SEA
- MIA
Nonstop5h 46m
Delta
Deal found 2/9![Delta logo]()
$247
This Delta deal was found by Cheapflights users on 2/11. 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 3/115:56 pm
MIA
- SEA
Nonstop6h 52m
Delta
Sun 3/158:00 am
SEA
- MIA
Nonstop5h 46m
Delta
Deal found 2/11![Delta logo]()
$262
This Delta deal was found by Cheapflights users on 2/12. 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 3/196:55 am
MIA
- SEA
1 stop10h 59m
Delta
Mon 3/235:55 pm
SEA
- MIA
1 stop9h 54m
Delta
Deal found 2/12![Delta logo]()
$217
This Delta deal was found by Cheapflights users on 2/12. 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 3/195:56 pm
MIA
- SEA
Nonstop6h 52m
Delta
Sun 4/197:15 am
SEA
- MIA
Nonstop5h 56m
Delta
Deal found 2/12![Delta logo]()
$237
This Frontier deal was found by Cheapflights users on 2/12. 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 3/195:50 am
MIA
- SEA
1 stop8h 29m
Frontier
Sun 4/194:20 pm
SEA
- MIA
1 stop9h 45m
Frontier
Deal found 2/12![Frontier logo]()
$245
This CheapOair deal was found by Cheapflights users on 2/11. 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 3/196:04 pm
MIA
- SEA
Nonstop6h 56m
Alaska Airlines
Tue 3/248:05 am
SEA
- MIA
Nonstop5h 59m
Alaska Airlines
Deal found 2/11![Alaska Airlines logo]()
$257
This Delta deal was found by Cheapflights users on 2/12. 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 3/205:56 pm
MIA
- SEA
Nonstop6h 52m
Delta
Sun 4/199:45 pm
SEA
- MIA
1 stop8h 35m
Delta
Deal found 2/12![Delta logo]()
$207
One-way flights from Key Largo to SeattleSearch for one-way flight options from Key Largo to Seattle. Find affordable one-way fares based on user searches. Data last updated February 13, 2026.
Search for one-way flight options from Key Largo to Seattle. Find affordable one-way fares based on user searches. Data last updated February 13, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 3/59:18 pm
MIA
- SEA
2 stops45h 58m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$141
This eDestinos deal was found by Cheapflights users on 2/10. 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.
Tue 3/102:06 pm
MIA
- SEA
2 stops30h 03m
Frontier
Deal found 2/10![Frontier logo]()
$143
This Delta deal was found by Cheapflights users on 2/11. 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 3/115:56 pm
MIA
- SEA
Nonstop6h 52m
Delta
Deal found 2/11![Delta logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 2/257:05 am
MIA
- SEA
2 stops40h 03m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$145
This Kiwi.com deal was found by Cheapflights users on 2/11. 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 4/214:09 pm
MIA
- SEA
3 stops20h 18m
Multiple Airlines
Deal found 2/11![Multiple Airlines logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 3/157:00 am
MIA
- SEA
2 stops40h 21m
Frontier
Deal found 2/10![Frontier logo]()
$148
This Southwest deal was found by Cheapflights users on 2/10. 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.
Wed 3/256:30 am
MIA
- SEA
1 stop9h 15m
Southwest
Deal found 2/10![Southwest logo]()
$149
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 3/17:05 am
MIA
- SEA
2 stops31h 14m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$150
This Expedia deal was found by Cheapflights users on 2/10. 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.
Sun 4/265:50 am
MIA
- SEA
1 stop12h 15m
Frontier
Deal found 2/10![Frontier logo]()
$151
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 3/128:35 pm
MIA
- SEA
2 stops26h 46m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$152
This Kiwi.com deal was found by Cheapflights users on 2/11. 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 5/1012:26 pm
MIA
- SEA
2 stops24h 01m
Frontier
Deal found 2/11![Frontier logo]()
$153
This Kiwi.com deal was found by Cheapflights users on 2/10. 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.
Mon 3/165:15 am
MIA
- SEA
2 stops38h 54m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$154
Find 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 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $191 (Kiwi.com) |
One-way from | $141 (Kiwi.com) |
Popular in | November |
Cheapest in | October |
Average price | $367 |
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 February 13, 2026.
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
Thu 3/5
6:29 pm-10:15 pm
Nonstop6h 46m
Seattle/Tacoma Intl
Wed 3/11
8:00 am-4:46 pm
Nonstop5h 46m
$197
MiamiSeattle
MIA - SEA
MIASEA
Miami
Tue 3/24
3:33 pm-10:05 pm
1 stop9h 32m
Seattle/Tacoma Intl
Tue 3/31
7:35 pm-5:50 am
1 stop7h 15m
$217
MiamiSeattle
MIA - SEA
MIASEA
Miami
Thu 5/7
8:00 am-4:48 pm
1 stop11h 48m
Seattle/Tacoma Intl
Sat 5/16
5:30 am-5:41 pm
1 stop9h 11m
$217
MiamiSeattle
MIA - SEA
MIASEA
Miami
Wed 5/20
8:00 am-4:48 pm
1 stop11h 48m
Seattle/Tacoma Intl
Wed 6/3
8:00 am-5:02 pm
Nonstop6h 02m
$227
MiamiSeattle
MIA - SEA
MIASEA
Miami
Thu 5/14
8:00 am-2:51 pm
1 stop9h 51m
Seattle/Tacoma Intl
Wed 6/3
8:00 am-5:02 pm
Nonstop6h 02m
$227
MiamiSeattle
MIA - SEA
MIASEA
Miami
Fri 5/15
6:15 pm-10:05 pm
Nonstop6h 50m
Seattle/Tacoma Intl
Sun 5/24
8:00 am-5:04 pm
Nonstop6h 04m
$237
MiamiSeattle
MIA - SEA
MIASEA
Miami
Thu 3/19
5:56 pm-9:48 pm
Nonstop6h 52m
Seattle/Tacoma Intl
Sun 4/19
7:15 am-4:11 pm
Nonstop5h 56m
$237
MiamiSeattle
MIA - SEA
MIASEA
Miami
Tue 4/21
5:25 pm-9:05 pm
Nonstop6h 40m
Seattle/Tacoma Intl
Tue 4/28
7:15 am-4:11 pm
Nonstop5h 56m
$247
MiamiSeattle
MIA - SEA
MIASEA
Miami
Thu 4/30
5:25 pm-9:05 pm
Nonstop6h 40m
Seattle/Tacoma Intl
Sat 5/9
8:00 am-5:04 pm
Nonstop6h 04m
$257
MiamiSeattle
MIA - SEA
MIASEA
Miami
Tue 4/21
9:00 am-6:35 pm
2 stops12h 35m
Seattle/Tacoma Intl
Tue 4/28
5:00 am-3:38 pm
1 stop7h 38m
$262
Showing 1-10 of 23 results
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.
MIA-SEA
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
KE9-SEA
MIA-SEA
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 6, 2026.
To ensure you get the cheapest price possible for a flight from Key Largo to Seattle, you should look to book at least 87 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, April is the cheapest month in which you can book a flight from Key Largo to Seattle (average of $128). Flying from Key Largo to Seattle in November is currently the most expensive (average of $208). 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 13, 2026.
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.
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 13, 2026.
The most flights from KE9 to SEA are scheduled on a Thursday (8 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (4 on average).
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 13, 2026.
Read reviews from past customers who have flown Alaska Airlines, Delta, and Hawaiian Airlines from Key Largo to Seattle. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.0
Comfort
7.8
Food
7.1
Boarding
8.1
Crew
8.5
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - SEA
Entertainment
7.0
Comfort
7.8
Food
7.1
Boarding
8.1
Crew
8.5
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - SEA
Entertainment
7.0
Comfort
7.8
Food
7.1
Boarding
8.1
Crew
8.5
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - SEA
Entertainment
7.0
Comfort
7.8
Food
7.1
Boarding
8.1
Crew
8.5
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - SEA
Entertainment
7.0
Comfort
7.8
Food
7.1
Boarding
8.1
Crew
8.5
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - SEA
Entertainment
7.0
Comfort
7.8
Food
7.1
Boarding
8.1
Crew
8.5
Overall
8.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - SEA
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.
Traveling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locationsTacoma
SeaTac
Lakewood
Ocean Shores
Olympia
Lynnwood
Edmonds
Lacey
Kent
Renton
Puyallup
Kirkland
Tukwila
Fife
Aberdeen
Shoreline
Marysville
Centralia
Federal Way
Chehalis
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Alternative routes for Key Largo to Seattle
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Complete your trip
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Search flights from Key Largo to Seattle by cabin class
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Key Largo and Seattle flights
Browse other Key Largo and Seattle flight options. Last updated on February 13, 2026.
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Other flights to Seattle
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on February 13, 2026.
Key Largo to Seattle flights
Consider these flights traveling from Key Largo to Seattle.
Top 8 airlines flying from Key Largo to Seattle
Discover the top 8 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 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$98 | Average$205 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$98 | Average$289 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$108 | Average$253 | FlexibilityNo cancel fee | On-time85% | |
| Cheapest$158 | Average$339 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$178 | Average$357 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$192 | Average$418 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$197 | Average$347 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$214 | Average$307 | FlexibilityNo cancel fee | On-time63% |