$109+ Cheap flights from Portland, ME (PWM) 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 4/13. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — MIA
Feb 28 — Mar 71
1 adult, Economy
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Find cheap flights from Portland 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.Cheap flight deals from Portland to Key Largo
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Cheapest flights from Portland to Key LargoExplore the most affordable flight options available from Portland to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.
Explore the most affordable flight options available from Portland to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.
This Southwest deal was found by Cheapflights users on 1/28. 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.
Tue 2/243:30 pm
PWM
- MIA
1 stop5h 30m
Southwest
Fri 2/275:55 am
MIA
- PWM
1 stop5h 20m
Southwest
Deal found 1/28![Southwest logo]()
$217
This United Airlines deal was found by Cheapflights users on 1/28. 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.
Wed 2/256:00 am
PWM
- MIA
2 stops11h 29m
United Airlines
Wed 3/45:05 pm
MIA
- PWM
1 stop6h 15m
United Airlines
Deal found 1/28![United Airlines logo]()
$222
This United Airlines deal was found by Cheapflights users on 1/26. 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.
Sat 2/283:05 pm
PWM
- MIA
1 stop7h 30m
United Airlines
Wed 3/45:05 pm
MIA
- PWM
1 stop6h 15m
United Airlines
Deal found 1/26![United Airlines logo]()
$243
This American Airlines deal was found by Cheapflights users on 1/28. 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.
Wed 3/46:00 am
PWM
- MIA
2 stops8h 26m
American Airlines
Wed 3/113:28 pm
MIA
- PWM
1 stop7h 22m
American Airlines
Deal found 1/28![American Airlines logo]()
$246
This Delta deal was found by Cheapflights users on 1/28. 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 2/175:31 am
PWM
- MIA
1 stop8h 42m
Delta
Thu 3/127:40 am
MIA
- PWM
1 stop6h 10m
Delta
Deal found 1/28![Delta logo]()
$248
This Delta deal was found by Cheapflights users on 1/26. 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 5/292:35 pm
PWM
- MIA
1 stop8h 38m
Delta
Wed 6/37:00 am
MIA
- PWM
1 stop16h 59m
Delta
Deal found 1/26![Delta logo]()
$250
This Delta deal was found by Cheapflights users on 1/29. 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 4/136:30 am
PWM
- MIA
2 stops18h 24m
Delta
Tue 4/215:46 pm
MIA
- PWM
1 stop7h 00m
Delta
Deal found 1/29![Delta logo]()
$255
This United Airlines deal was found by Cheapflights users on 1/27. 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 10/206:00 am
PWM
- MIA
2 stops12h 29m
United Airlines
Sat 10/248:00 am
MIA
- PWM
1 stop5h 38m
United Airlines
Deal found 1/27![United Airlines logo]()
$256
This Delta deal was found by Cheapflights users on 1/26. 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 6/212:50 pm
PWM
- MIA
1 stop8h 42m
Delta
Wed 6/37:00 am
MIA
- PWM
1 stop16h 59m
Delta
Deal found 1/26![Delta logo]()
$260
This Delta deal was found by Cheapflights users on 1/27. 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 2/212:35 pm
PWM
- MIA
1 stop8h 45m
Delta
Thu 2/265:36 pm
MIA
- PWM
1 stop6h 42m
Delta
Deal found 1/27![Delta logo]()
$268
This Delta deal was found by Cheapflights users on 1/27. 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 2/222:35 pm
PWM
- MIA
1 stop8h 45m
Delta
Tue 3/34:46 pm
MIA
- PWM
1 stop6h 20m
Delta
Deal found 1/27![Delta logo]()
$278
Best flights from Portland to Key LargoDiscover carefully curated flight deals from Portland to Key Largo that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated January 29, 2026.
Discover carefully curated flight deals from Portland to Key Largo that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated January 29, 2026.
This Delta deal was found by Cheapflights users on 1/27. 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 2/246:00 am
PWM
- MIA
1 stop6h 29m
Delta
Fri 2/275:36 pm
MIA
- PWM
1 stop6h 42m
Delta
Deal found 1/27![Delta logo]()
$217
This Southwest deal was found by Cheapflights users on 1/27. 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 2/253:30 pm
PWM
- MIA
1 stop5h 30m
Southwest
Wed 3/47:15 am
MIA
- PWM
1 stop4h 55m
Southwest
Deal found 1/27![Southwest logo]()
$217
This Delta deal was found by Cheapflights users on 1/29. 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 4/146:00 am
PWM
- MIA
1 stop6h 26m
Delta
Tue 4/215:46 pm
MIA
- PWM
1 stop7h 00m
Delta
Deal found 1/29![Delta logo]()
$217
This Delta deal was found by Cheapflights users on 1/26. 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 5/293:00 pm
PWM
- MIA
1 stop7h 53m
Delta
Tue 6/27:00 am
MIA
- PWM
1 stop6h 54m
Delta
Deal found 1/26![Delta logo]()
$217
This Delta deal was found by Cheapflights users on 1/29. 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 4/136:30 am
PWM
- MIA
1 stop7h 55m
Delta
Mon 4/203:35 pm
MIA
- PWM
1 stop7h 49m
Delta
Deal found 1/29![Delta logo]()
$217
This Southwest deal was found by Cheapflights users on 1/27. 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 2/233:55 pm
PWM
- MIA
1 stop6h 30m
Southwest
Sat 2/287:00 am
MIA
- PWM
1 stop6h 25m
Southwest
Deal found 1/27![Southwest logo]()
$268
This Delta deal was found by Cheapflights users on 1/27. 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 3/105:48 pm
PWM
- MIA
1 stop5h 30m
Delta
Wed 3/119:25 am
MIA
- PWM
1 stop7h 43m
Delta
Deal found 1/27![Delta logo]()
$217
This Southwest deal was found by Cheapflights users on 1/28. 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.
Tue 2/245:45 am
PWM
- MIA
2 stops12h 50m
Southwest
Fri 2/275:55 am
MIA
- PWM
1 stop7h 50m
Southwest
Deal found 1/28![Southwest logo]()
$273
This Delta deal was found by Cheapflights users on 1/29. 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 4/136:30 am
PWM
- MIA
1 stop7h 55m
Delta
Sat 4/188:04 am
MIA
- PWM
1 stop7h 53m
Delta
Deal found 1/29![Delta logo]()
$248
This Delta deal was found by Cheapflights users on 1/29. 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 4/136:30 am
PWM
- MIA
2 stops18h 24m
Delta
Tue 4/215:46 pm
MIA
- PWM
1 stop7h 00m
Delta
Deal found 1/29![Delta logo]()
$255
This Delta deal was found by Cheapflights users on 1/27. 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 2/222:35 pm
PWM
- MIA
1 stop8h 45m
Delta
Thu 2/265:36 pm
MIA
- PWM
1 stop6h 42m
Delta
Deal found 1/27![Delta logo]()
$278
Last-minute flights from Portland to Key LargoDiscover last-minute flight deals from Portland to Key Largo. Data last updated January 29, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Key Largo. Data last updated January 29, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 1/27. 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 2/36:00 am
PWM
- MIA
1 stop6h 54m
Delta
Tue 2/107:39 am
MIA
- PWM
1 stop6h 06m
Delta
Deal found 1/27![Delta logo]()
$290
This Southwest deal was found by Cheapflights users on 1/27. 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.
Tue 2/35:45 am
PWM
- MIA
2 stops12h 50m
Southwest
Wed 2/117:15 am
MIA
- PWM
1 stop4h 55m
Southwest
Deal found 1/27![Southwest logo]()
$295
This Delta deal was found by Cheapflights users on 1/28. 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 2/175:31 am
PWM
- MIA
1 stop8h 42m
Delta
Thu 3/127:40 am
MIA
- PWM
1 stop6h 10m
Delta
Deal found 1/28![Delta logo]()
$248
This Delta deal was found by Cheapflights users on 1/27. 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 2/212:35 pm
PWM
- MIA
1 stop8h 45m
Delta
Wed 2/255:36 pm
MIA
- PWM
1 stop6h 42m
Delta
Deal found 1/27![Delta logo]()
$268
This Delta deal was found by Cheapflights users on 1/27. 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 2/222:35 pm
PWM
- MIA
1 stop8h 45m
Delta
Tue 3/34:46 pm
MIA
- PWM
1 stop6h 20m
Delta
Deal found 1/27![Delta logo]()
$278
This Southwest deal was found by Cheapflights users on 1/28. 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.
Tue 2/243:30 pm
PWM
- MIA
1 stop5h 30m
Southwest
Fri 2/275:55 am
MIA
- PWM
1 stop5h 20m
Southwest
Deal found 1/28![Southwest logo]()
$217
This American Airlines deal was found by Cheapflights users on 1/28. 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 2/245:07 pm
PWM
- MIA
1 stop5h 45m
American Airlines
Sat 3/76:40 am
MIA
- PWM
1 stop5h 19m
American Airlines
Deal found 1/28![American Airlines logo]()
$292
This United Airlines deal was found by Cheapflights users on 1/28. 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.
Wed 2/256:00 am
PWM
- MIA
2 stops11h 29m
United Airlines
Wed 3/45:05 pm
MIA
- PWM
1 stop6h 15m
United Airlines
Deal found 1/28![United Airlines logo]()
$222
This United Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/266:00 am
PWM
- MIA
2 stops11h 29m
United Airlines
Thu 3/52:30 pm
MIA
- PWM
1 stop8h 21m
United Airlines
Deal found 1/27![United Airlines logo]()
$288
This United Airlines deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/266:00 am
PWM
- MIA
2 stops11h 29m
United Airlines
Wed 3/45:05 pm
MIA
- PWM
1 stop6h 15m
United Airlines
Deal found 1/26![United Airlines logo]()
$293
This United Airlines deal was found by Cheapflights users on 1/26. 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.
Sat 2/283:05 pm
PWM
- MIA
1 stop7h 30m
United Airlines
Wed 3/45:05 pm
MIA
- PWM
1 stop6h 15m
United Airlines
Deal found 1/26![United Airlines logo]()
$243
One-way flights from Portland to Key LargoSearch for one-way flight options from Portland to Key Largo. Find affordable one-way fares based on user searches. Data last updated January 29, 2026.
Search for one-way flight options from Portland to Key Largo. Find affordable one-way fares based on user searches. Data last updated January 29, 2026.
This Delta deal was found by Cheapflights users on 1/28. 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 7/216:50 pm
PWM
- MIA
1 stop6h 04m
Delta
Deal found 1/28![Delta logo]()
$109
This United Airlines deal was found by Cheapflights users on 1/28. 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.
Wed 2/186:00 am
PWM
- MIA
2 stops11h 29m
United Airlines
Deal found 1/28![United Airlines logo]()
$114
This United Airlines deal was found by Cheapflights users on 1/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/285:20 am
PWM
- MIA
2 stops10h 56m
United Airlines
Deal found 1/29![United Airlines logo]()
$147
This American Airlines deal was found by Cheapflights users on 1/26. 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 2/106:00 am
PWM
- MIA
1 stop7h 38m
American Airlines
Deal found 1/26![American Airlines logo]()
$149
This United Airlines deal was found by Cheapflights users on 1/28. 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 7/216:00 am
PWM
- MIA
2 stops12h 29m
United Airlines
Deal found 1/28![United Airlines logo]()
$154
This Delta deal was found by Cheapflights users on 1/26. 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 2/175:31 am
PWM
- MIA
1 stop8h 42m
Delta
Deal found 1/26![Delta logo]()
$160
This American Airlines deal was found by Cheapflights users on 1/27. 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.
Sun 3/87:10 am
PWM
- MIA
1 stop8h 20m
American Airlines
Deal found 1/27![American Airlines logo]()
$170
This Southwest deal was found by Cheapflights users on 1/28. 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.
Sun 4/124:20 pm
PWM
- MIA
1 stop6h 25m
Southwest
Deal found 1/28![Southwest logo]()
$180
This Delta deal was found by Cheapflights users on 1/29. 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 2/55:30 am
PWM
- MIA
1 stop6h 44m
Delta
Deal found 1/29![Delta logo]()
$182
This Southwest deal was found by Cheapflights users on 1/27. 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 6/151:00 pm
PWM
- MIA
2 stops9h 05m
Southwest
Deal found 1/27![Southwest logo]()
$185
This American Airlines deal was found by Cheapflights users on 1/27. 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 2/512:40 pm
PWM
- MIA
2 stops8h 30m
American Airlines
Deal found 1/27![American Airlines logo]()
$187
This Delta deal was found by Cheapflights users on 1/28. 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 2/275:59 pm
PWM
- MIA
1 stop24h 55m
Delta
Deal found 1/28![Delta logo]()
$198
Find flight deals from Portland to Key Largo
Keep the following information in mind while searching for Portland to Key Largo flight deals. Data was last updated January 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $217 (Southwest) |
One-way from | $109 (Delta) |
Popular in | July |
Cheapest in | September |
Average price | $328 |
Cheapflights Fare Finder
Customize your flight search to find flights from Portland 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 January 29, 2026.
Use the filters below to find and compare flights from Portland to Key Largo that are best for you.
Fly from
Portland
Fly to
Key Largo
Route
Depart
Return
Price
PortlandMiami
PWM - MIA
PWMMIA
Portland
Tue 2/24
6:00 am-12:29 pm
1 stop6h 29m
Miami
Fri 2/27
5:36 pm-12:18 am
1 stop6h 42m
$217
PortlandMiami
PWM - MIA
PWMMIA
Portland
Wed 2/25
3:30 pm-9:00 pm
1 stop5h 30m
Miami
Wed 3/4
7:15 am-12:10 pm
1 stop4h 55m
$217
PortlandMiami
PWM - MIA
PWMMIA
Portland
Tue 4/14
6:00 am-12:26 pm
1 stop6h 26m
Miami
Tue 4/21
5:46 pm-12:46 am
1 stop7h 00m
$217
PortlandMiami
PWM - MIA
PWMMIA
Portland
Fri 5/29
3:00 pm-10:53 pm
1 stop7h 53m
Miami
Tue 6/2
7:00 am-1:54 pm
1 stop6h 54m
$217
PortlandMiami
PWM - MIA
PWMMIA
Portland
Mon 4/13
6:30 am-2:25 pm
1 stop7h 55m
Miami
Mon 4/20
3:35 pm-11:24 pm
1 stop7h 49m
$217
PortlandMiami
PWM - MIA
PWMMIA
Portland
Tue 3/10
5:48 pm-11:18 pm
1 stop5h 30m
Miami
Wed 3/11
9:25 am-5:08 pm
1 stop7h 43m
$217
PortlandMiami
PWM - MIA
PWMMIA
Portland
Mon 4/13
6:30 am-2:25 pm
1 stop7h 55m
Miami
Sat 4/18
8:04 am-3:57 pm
1 stop7h 53m
$248
PortlandMiami
PWM - MIA
PWMMIA
Portland
Mon 4/13
6:30 am-12:54 am
2 stops18h 24m
Miami
Tue 4/21
5:46 pm-12:46 am
1 stop7h 00m
$255
PortlandMiami
PWM - MIA
PWMMIA
Portland
Mon 2/23
3:55 pm-10:25 pm
1 stop6h 30m
Miami
Sat 2/28
7:00 am-1:25 pm
1 stop6h 25m
$268
PortlandMiami
PWM - MIA
PWMMIA
Portland
Tue 2/24
5:45 am-6:35 pm
2 stops12h 50m
Miami
Fri 2/27
5:55 am-1:45 pm
1 stop7h 50m
$273
Showing 1-10 of 19 results
Best time to book a flight from Portland to Key Largo
Have a flexible travel schedule? Discover the best time to fly to Key Largo from Portland with our price prediction graph.
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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 Portland to Key Largo
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How far ahead should I book a flight from Portland, Maine to Key Largo?
Use this chart to determine the optimal time to book a round-trip flight from Portland to Key Largo. Price data was last updated on January 23, 2026.
Booking 39 days in advance of your planned departure date is, on average, the best time to get cheap flights from Portland, Maine to Key Largo. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from Portland, Maine to Key Largo?
Currently, February is the cheapest month in which you can book a flight from Portland, Maine to Key Largo (average of $50). Flying from Portland, Maine to Key Largo in December is currently the most expensive (average of $108). 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.
How much does it cost to fly round-trip from Portland, Maine 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 January 29, 2026.
Read reviews from past customers who have flown Southwest, Delta, and United Airlines from Portland to Key Largo. 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.
Crew
8.6
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Crew
8.6
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Food
7.0
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Related info for your journey
Find useful and relevant information for your journey from Portland to Key Largo. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Portland to Key Largo
See prices for flight routes from nearby airports that may be better suited for you.
Top 5 airlines flying from Portland to Key Largo
Discover the top 5 airlines that operate flights from Portland 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 January 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$118 | Average$328 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$194 | Average$291 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$212 | Average$372 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$216 | Average$452 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$216 | Average$396 | FlexibilityNo cancel fee | On-time71% |