$82+ Cheap flights from Boston (BOS) 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 5/30. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — MIA
Jun 8 — Jun 151
Round-trip
1 adult, Economy
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Find cheap flights from Boston 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 Boston Logan Intl to Key Largo are usually found in September or October, booked 46 days in advance, depart on a Thursday or Saturday and return on a Thursday
Cheap flight deals from Boston to Key Largo
Cheapest
Best
Last-minute
One-way
Cheapest flights from Boston to Key LargoExplore the most affordable flight options available from Boston to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 9, 2026.
Explore the most affordable flight options available from Boston to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 9, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/4. 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 5/269:12 am
BOS
- MIA
1 stop13h 35m
Frontier
Thu 5/285:22 pm
MIA
- BOS
1 stop14h 27m
Frontier
Deal found 5/4![Frontier logo]()
$174
This Kiwi.com deal was found by Cheapflights users on 5/4. 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 5/269:12 am
BOS
- MIA
1 stop13h 35m
Frontier
Sat 5/308:10 am
MIA
- BOS
1 stop17h 14m
Frontier
Deal found 5/4![Frontier logo]()
$178
This Kiwi.com deal was found by Cheapflights users on 5/6. 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 6/66:00 am
BOS
- MIA
1 stop16h 47m
Frontier
Tue 6/93:40 pm
MIA
- BOS
1 stop19h 25m
Frontier
Deal found 5/6![Frontier logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 5/5. 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 6/38:44 am
BOS
- MIA
2 stops14h 03m
Frontier
Wed 6/1011:19 am
MIA
- BOS
1 stop14h 08m
Frontier
Deal found 5/5![Frontier logo]()
$187
This Kiwi.com deal was found by Cheapflights users on 5/7. 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 6/29:12 am
BOS
- MIA
1 stop13h 35m
Frontier
Tue 6/95:26 pm
MIA
- BOS
2 stops17h 39m
Frontier
Deal found 5/7![Frontier logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 5/4. 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 6/49:12 am
BOS
- MIA
1 stop7h 15m
Frontier
Wed 6/105:26 pm
MIA
- BOS
1 stop8h 01m
Frontier
Deal found 5/4![Frontier logo]()
$191
This Kiwi.com deal was found by Cheapflights users on 5/7. 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 6/96:00 am
BOS
- MIA
2 stops14h 58m
Frontier
Wed 6/105:26 pm
MIA
- BOS
1 stop8h 01m
Frontier
Deal found 5/7![Frontier logo]()
$194
This Kiwi.com deal was found by Cheapflights users on 5/4. 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 5/306:00 am
BOS
- MIA
1 stop16h 47m
Frontier
Mon 6/15:05 am
MIA
- BOS
1 stop6h 01m
Frontier
Deal found 5/4![Frontier logo]()
$195
This Kiwi.com deal was found by Cheapflights users on 5/5. 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 5/306:00 am
BOS
- MIA
1 stop16h 47m
Frontier
Sat 6/68:10 am
MIA
- BOS
1 stop17h 14m
Frontier
Deal found 5/5![Frontier logo]()
$196
Best flights from Boston to Key LargoDiscover carefully curated flight deals from Boston to Key Largo that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 9, 2026.
Discover carefully curated flight deals from Boston to Key Largo that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 9, 2026.
This Delta deal was found by Cheapflights users on 5/4. 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 7/313:15 pm
BOS
- MIA
Nonstop3h 43m
Delta
Tue 8/47:00 am
MIA
- BOS
1 stop5h 45m
Delta
Deal found 5/4![Delta logo]()
$267
This Southwest deal was found by Cheapflights users on 5/4. 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 7/301:20 pm
BOS
- MIA
2 stops8h 45m
Southwest
Tue 8/47:10 am
MIA
- BOS
2 stops8h 50m
Southwest
Deal found 5/4![Southwest logo]()
$287
This Delta deal was found by Cheapflights users on 5/4. 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 6/273:18 pm
BOS
- MIA
Nonstop3h 46m
Delta
Fri 7/103:17 pm
MIA
- BOS
1 stop7h 26m
Delta
Deal found 5/4![Delta logo]()
$293
This Southwest deal was found by Cheapflights users on 5/7. 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.
Fri 7/31:20 pm
BOS
- MIA
2 stops8h 45m
Southwest
Mon 7/67:15 am
MIA
- BOS
1 stop10h 50m
Southwest
Deal found 5/7![Southwest logo]()
$308
This Delta deal was found by Cheapflights users on 5/8. 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 7/293:15 pm
BOS
- MIA
Nonstop3h 43m
Delta
Mon 8/37:58 pm
MIA
- BOS
Nonstop3h 38m
Delta
Deal found 5/8![Delta logo]()
$297
This Delta deal was found by Cheapflights users on 5/8. 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 7/77:05 am
BOS
- MIA
Nonstop3h 30m
Delta
Sun 7/2611:30 am
MIA
- BOS
Nonstop3h 29m
Delta
Deal found 5/8![Delta logo]()
$297
This Southwest deal was found by Cheapflights users on 5/5. 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 5/3012:40 pm
BOS
- MIA
1 stop7h 40m
Southwest
Sat 6/66:10 am
MIA
- BOS
2 stops9h 35m
Southwest
Deal found 5/5![Southwest logo]()
$342
This Delta deal was found by Cheapflights users on 5/5. 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 7/57:20 am
BOS
- MIA
Nonstop3h 29m
Delta
Fri 7/107:55 pm
MIA
- BOS
Nonstop3h 38m
Delta
Deal found 5/5![Delta logo]()
$302
This Delta deal was found by Cheapflights users on 5/8. 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 7/126:05 am
BOS
- MIA
1 stop8h 15m
Delta
Fri 7/177:55 pm
MIA
- BOS
Nonstop3h 38m
Delta
Deal found 5/8![Delta logo]()
$307
This Delta deal was found by Cheapflights users on 5/6. 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 5/233:20 pm
BOS
- MIA
Nonstop3h 39m
Delta
Wed 5/2711:10 am
MIA
- BOS
1 stop8h 55m
Delta
Deal found 5/6![Delta logo]()
$332
This Delta deal was found by Cheapflights users on 5/5. 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 10/173:00 pm
BOS
- MIA
Nonstop3h 41m
Delta
Sun 10/257:55 pm
MIA
- BOS
Nonstop3h 28m
Delta
Deal found 5/5![Delta logo]()
$362
Last-minute flights from Boston to Key LargoDiscover last-minute flight deals from Boston to Key Largo. Data last updated May 9, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to Key Largo. Data last updated May 9, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 5/4. 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 5/186:00 am
BOS
- MIA
1 stop7h 20m
Frontier
Thu 5/215:22 pm
MIA
- BOS
1 stop8h 02m
Frontier
Deal found 5/4![Frontier logo]()
$235
This Kiwi.com deal was found by Cheapflights users on 5/5. 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 5/196:00 am
BOS
- MIA
1 stop16h 47m
Frontier
Tue 7/75:28 pm
MIA
- BOS
1 stop7h 55m
Frontier
Deal found 5/5![Frontier logo]()
$200
This Expedia deal was found by Cheapflights users on 5/4. 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 5/199:31 am
BOS
- MIA
1 stop6h 56m
Frontier
Wed 5/205:22 pm
MIA
- BOS
1 stop8h 02m
Frontier
Deal found 5/4![Frontier logo]()
$210
This American Airlines deal was found by Cheapflights users on 5/5. 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 5/195:00 am
BOS
- MIA
Nonstop3h 31m
American Airlines
Tue 7/79:45 pm
MIA
- BOS
Nonstop3h 14m
American Airlines
Deal found 5/5![American Airlines logo]()
$222
This Delta deal was found by Cheapflights users on 5/5. 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 5/197:15 am
BOS
- MIA
Nonstop3h 29m
Delta
Wed 5/207:57 pm
MIA
- BOS
Nonstop3h 34m
Delta
Deal found 5/5![Delta logo]()
$237
This Southwest deal was found by Cheapflights users on 5/5. 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 5/1912:55 pm
BOS
- MIA
2 stops9h 00m
Southwest
Wed 5/206:40 am
MIA
- BOS
1 stop9h 25m
Southwest
Deal found 5/5![Southwest logo]()
$242
This Expedia deal was found by Cheapflights users on 5/5. 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 5/196:00 am
BOS
- MIA
1 stop10h 27m
Frontier
Fri 5/225:05 am
MIA
- BOS
1 stop6h 01m
Frontier
Deal found 5/5![Frontier logo]()
$250
This Delta deal was found by Cheapflights users on 5/5. 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 5/198:00 am
BOS
- MIA
1 stop6h 56m
Delta
Sat 5/237:57 pm
MIA
- BOS
Nonstop3h 34m
Delta
Deal found 5/5![Delta logo]()
$257
This United Airlines deal was found by Cheapflights users on 5/5. 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 5/199:30 am
BOS
- MIA
1 stop6h 46m
United Airlines
Sat 5/234:06 pm
MIA
- BOS
1 stop7h 15m
United Airlines
Deal found 5/5![United Airlines logo]()
$261
One-way flights from Boston to Key LargoSearch for one-way flight options from Boston to Key Largo. Find affordable one-way fares based on user searches. Data last updated May 9, 2026.
Search for one-way flight options from Boston to Key Largo. Find affordable one-way fares based on user searches. Data last updated May 9, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/4. 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 5/306:00 am
BOS
- MIA
1 stop16h 47m
Frontier
Deal found 5/4![Frontier logo]()
$82
This Kiwi.com deal was found by Cheapflights users on 5/4. 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 6/166:00 am
BOS
- MIA
1 stop7h 49m
Frontier
Deal found 5/4![Frontier logo]()
$89
This Trip.com deal was found by Cheapflights users on 5/4. 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 6/49:12 am
BOS
- MIA
1 stop7h 15m
Frontier
Deal found 5/4![Frontier logo]()
$91
This eDestinos deal was found by Cheapflights users on 5/3. 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.
Thu 5/289:12 am
BOS
- MIA
1 stop7h 15m
Frontier
Deal found 5/3![Frontier logo]()
$95
This Super.com deal was found by Cheapflights users on 5/4. 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 5/186:00 am
BOS
- MIA
1 stop7h 20m
Frontier
Deal found 5/4![Frontier logo]()
$99
This Kiwi.com deal was found by Cheapflights users on 5/8. 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 6/108:47 am
BOS
- MIA
2 stops14h 16m
Frontier
Deal found 5/8![Frontier logo]()
$101
This Kiwi.com deal was found by Cheapflights users on 5/8. 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 6/29:12 am
BOS
- MIA
1 stop13h 35m
Frontier
Deal found 5/8![Frontier logo]()
$102
This Super.com deal was found by Cheapflights users on 5/6. 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.
Tue 7/149:14 am
BOS
- MIA
1 stop7h 19m
Frontier
Deal found 5/6![Frontier logo]()
$104
This CheapOair deal was found by Cheapflights users on 5/4. 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.
Wed 5/206:00 am
BOS
- MIA
1 stop10h 27m
Frontier
Deal found 5/4![Frontier logo]()
$106
This Trip.com deal was found by Cheapflights users on 5/7. 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.
Sat 6/66:00 am
BOS
- MIA
1 stop16h 47m
Frontier
Deal found 5/7![Frontier logo]()
$108
Find flight deals from Boston to Key Largo
Keep the following information in mind while searching for Boston to Key Largo flight deals. Data was last updated May 9, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $174 (Kiwi.com) |
One-way from | $82 (Kiwi.com) |
Popular in | December |
Cheapest in | September |
Average price | $282 |
Cheapflights Fare Finder
Customize your flight search to find flights from Boston 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 May 9, 2026.
Use the filters below to find and compare flights from Boston to Key Largo that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BostonMiami
BOS - MIA
BOSMIA
Boston Logan Intl
Fri 7/31
3:15 pm-6:58 pm
Nonstop3h 43m
Miami
Tue 8/4
7:00 am-12:45 pm
1 stop5h 45m
$267
BostonMiami
BOS - MIA
BOSMIA
Boston Logan Intl
Thu 7/30
1:20 pm-10:05 pm
2 stops8h 45m
Miami
Tue 8/4
7:10 am-4:00 pm
2 stops8h 50m
$287
BostonMiami
BOS - MIA
BOSMIA
Boston Logan Intl
Sat 6/27
3:18 pm-7:04 pm
Nonstop3h 46m
Miami
Fri 7/10
3:17 pm-10:43 pm
1 stop7h 26m
$293
BostonMiami
BOS - MIA
BOSMIA
Boston Logan Intl
Wed 7/29
3:15 pm-6:58 pm
Nonstop3h 43m
Miami
Mon 8/3
7:58 pm-11:36 pm
Nonstop3h 38m
$297
Quickest round-trip
BostonMiami
BOS - MIA
BOSMIA
Boston Logan Intl
Tue 7/7
7:05 am-10:35 am
Nonstop3h 30m
Miami
Sun 7/26
11:30 am-2:59 pm
Nonstop3h 29m
$297
BostonMiami
BOS - MIA
BOSMIA
Boston Logan Intl
Sun 7/5
7:20 am-10:49 am
Nonstop3h 29m
Miami
Fri 7/10
7:55 pm-11:33 pm
Nonstop3h 38m
$302
BostonMiami
BOS - MIA
BOSMIA
Boston Logan Intl
Sun 7/12
6:05 am-2:20 pm
1 stop8h 15m
Miami
Fri 7/17
7:55 pm-11:33 pm
Nonstop3h 38m
$307
BostonMiami
BOS - MIA
BOSMIA
Boston Logan Intl
Fri 7/3
1:20 pm-10:05 pm
2 stops8h 45m
Miami
Mon 7/6
7:15 am-6:05 pm
1 stop10h 50m
$308
BostonMiami
BOS - MIA
BOSMIA
Boston Logan Intl
Sat 5/23
3:20 pm-6:59 pm
Nonstop3h 39m
Miami
Wed 5/27
11:10 am-8:05 pm
1 stop8h 55m
$332
BostonMiami
BOS - MIA
BOSMIA
Boston Logan Intl
Sat 5/30
12:40 pm-8:20 pm
1 stop7h 40m
Miami
Sat 6/6
6:10 am-3:45 pm
2 stops9h 35m
$342
Showing 1-10 of 23 resultsSorted by cheapest first
Best time to book a flight from Boston to Key Largo
Have a flexible travel schedule? Discover the best time to fly to Key Largo from Boston with our price prediction graph.
BOS-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 Boston to Key Largo
BOS-KE9
BOS-MIA
What is the cheapest time of day to fly from BOS to KE9?
Find hourly flight availability from Boston 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 May 9, 2026.
It’s typically best to fly out from Boston to Key Largo in the evening. Doing so could potentially save you 38% on the flight price compared to flying at noon, which is usually more expensive.
What is the cheapest day to fly from Boston to Key Largo?
Use this chart to determine the cheapest time to fly round-trip from Boston to Key Largo. Price data was last updated on May 2, 2026.
Travelers seeking maximum savings on their Boston to Key Largo flight should consider departing on Monday at noon when fares are most often at their lowest. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from Boston to Key Largo
Explore weekly flight availability from Boston 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 May 9, 2026.
The most flights from BOS to KE9 are scheduled on a Wednesday (23 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (14 on average).
How much does it cost to fly round-trip from Boston 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 May 9, 2026.
Get a feel of what it's like to fly with Delta,JetBlue, andAmerican Airlines from Boston to Key Largo by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.8
Overall
7.9
Boarding
8.1
Crew
8.5
Food
7.2
Comfort
7.9
Reviews
1 / 20
4.0
OkayJoel,May 2026
ATL - JAX
Entertainment
7.8
Overall
7.9
Boarding
8.1
Crew
8.5
Food
7.2
Comfort
7.9
Reviews
1 / 20
4.0
OkayJoel,May 2026
ATL - JAX
Entertainment
7.8
Overall
7.9
Boarding
8.1
Crew
8.5
Food
7.2
Comfort
7.9
Reviews
1 / 20
4.0
OkayJoel,May 2026
ATL - JAX
Entertainment
7.8
Overall
7.9
Boarding
8.1
Crew
8.5
Food
7.2
Comfort
7.9
Reviews
1 / 20
4.0
OkayJoel,May 2026
ATL - JAX
Entertainment
7.8
Overall
7.9
Boarding
8.1
Crew
8.5
Food
7.2
Comfort
7.9
Reviews
1 / 20
4.0
OkayJoel,May 2026
ATL - JAX
Entertainment
7.8
Overall
7.9
Boarding
8.1
Crew
8.5
Food
7.2
Comfort
7.9
Reviews
1 / 20
4.0
OkayJoel,May 2026
ATL - JAX
Related info for your journey
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Boston and Key Largo flights
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Top 8 airlines flying from Boston to Key Largo
Discover the top 8 airlines that operate flights from Boston 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 May 9, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$50 | Average$214 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$55 | Average$212 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$94 | Average$314 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$108 | Average$308 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$153 | Average$300 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$165 | Average$358 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$166 | Average$257 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$177 | Average$405 | FlexibilityNo cancel fee | On-time63% |