$124+ Cheap flights from Key Largo, FL to Boston (BOS)
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 8/11. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — BOS
Jul 17 — Jul 241
Round-trip
1 adult, Economy
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Find cheap flights from Key Largo to Boston 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 Boston Logan Intl are usually found in January or February, booked 81 days in advance, depart on a Thursday or Friday and return on a Monday
Cheap flight deals from Key Largo to Boston
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Cheapest flights from Key Largo to BostonExplore the most affordable flight options available from Key Largo to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 17, 2026.
Explore the most affordable flight options available from Key Largo to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 17, 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.
Tue 8/187:58 pm
MIA
- BOS
Nonstop3h 38m
Delta
Sat 8/226:05 am
BOS
- MIA
1 stop8h 16m
Delta
Deal found 6/14![Delta logo]()
$218
This eDestinos 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/46:51 pm
MIA
- BOS
1 stop6h 36m
Frontier
Thu 7/1611:52 am
BOS
- MIA
1 stop11h 13m
Frontier
Deal found 6/16![Frontier logo]()
$221
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/37:58 pm
MIA
- BOS
Nonstop3h 32m
Delta
Sat 10/103:00 pm
BOS
- MIA
Nonstop3h 41m
Delta
Deal found 6/15![Delta logo]()
$222
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.
Tue 8/187:58 pm
MIA
- BOS
Nonstop3h 38m
Delta
Fri 8/213:20 pm
BOS
- MIA
Nonstop3h 43m
Delta
Deal found 6/14![Delta logo]()
$227
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.
Sat 10/37:06 am
MIA
- BOS
1 stop7h 46m
Delta
Wed 10/712:55 pm
BOS
- MIA
1 stop8h 43m
Delta
Deal found 6/14![Delta logo]()
$228
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/268:54 am
MIA
- BOS
1 stop5h 41m
United Airlines
Wed 9/309:30 am
BOS
- MIA
2 stops9h 22m
United Airlines
Deal found 6/16![United Airlines logo]()
$229
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/53:57 pm
MIA
- BOS
1 stop9h 17m
United Airlines
Tue 9/86:00 pm
BOS
- MIA
1 stop5h 52m
United Airlines
Deal found 6/15![United Airlines logo]()
$232
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/285:55 pm
MIA
- BOS
Nonstop3h 35m
American Airlines
Sat 9/55:13 pm
BOS
- MIA
Nonstop3h 47m
American Airlines
Deal found 6/16![American Airlines logo]()
$234
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/49:44 pm
MIA
- BOS
Nonstop3h 14m
American Airlines
Fri 9/113:25 pm
BOS
- MIA
Nonstop3h 35m
American Airlines
Deal found 6/16![American Airlines logo]()
$237
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.
Wed 8/197:58 pm
MIA
- BOS
Nonstop3h 38m
Delta
Wed 8/267:20 am
BOS
- MIA
Nonstop3h 32m
Delta
Deal found 6/14![Delta logo]()
$238
This eDestinos 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/185:26 pm
MIA
- BOS
1 stop8h 01m
Frontier
Tue 6/306:00 am
BOS
- MIA
1 stop10h 31m
Frontier
Deal found 6/14![Frontier logo]()
$240
Best flights from Key Largo to BostonDiscover carefully curated flight deals from Key Largo to Boston that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 17, 2026.
Discover carefully curated flight deals from Key Largo to Boston that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 17, 2026.
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/257:58 pm
MIA
- BOS
Nonstop3h 32m
Delta
Sun 9/277:10 am
BOS
- MIA
Nonstop3h 33m
Delta
Deal found 6/13![Delta logo]()
$237
This United Airlines deal was found by Cheapflights users on 6/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/207:07 am
MIA
- BOS
1 stop6h 28m
United Airlines
Tue 7/217:19 am
BOS
- MIA
1 stop7h 38m
United Airlines
Deal found 6/12![United Airlines logo]()
$277
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 7/47:05 am
MIA
- BOS
2 stops8h 15m
Southwest
Tue 7/75:35 am
BOS
- MIA
2 stops8h 50m
Southwest
Deal found 6/16![Southwest logo]()
$287
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/247:58 pm
MIA
- BOS
Nonstop3h 32m
Delta
Sun 9/277:10 am
BOS
- MIA
Nonstop3h 33m
Delta
Deal found 6/15![Delta logo]()
$243
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 9/411:50 am
MIA
- BOS
Nonstop3h 32m
Delta
Tue 9/83:05 pm
BOS
- MIA
Nonstop3h 41m
Delta
Deal found 6/14![Delta logo]()
$247
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.
Mon 7/207:55 pm
MIA
- BOS
Nonstop3h 38m
Delta
Wed 8/53:20 pm
BOS
- MIA
Nonstop3h 43m
Delta
Deal found 6/14![Delta logo]()
$257
This Delta deal was found by Cheapflights users on 6/12. 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 7/286:25 am
MIA
- BOS
1 stop6h 56m
Delta
Tue 8/47:20 am
BOS
- MIA
Nonstop3h 32m
Delta
Deal found 6/12![Delta logo]()
$267
This Delta deal was found by Cheapflights users on 6/12. 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 10/297:55 pm
MIA
- BOS
Nonstop3h 28m
Delta
Wed 11/47:00 am
BOS
- MIA
Nonstop3h 43m
Delta
Deal found 6/12![Delta logo]()
$287
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/208:00 am
MIA
- BOS
1 stop7h 46m
Delta
Sat 10/241:00 pm
BOS
- MIA
1 stop6h 13m
Delta
Deal found 6/13![Delta logo]()
$307
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/87:58 pm
MIA
- BOS
Nonstop3h 38m
Delta
Wed 8/198:55 am
BOS
- MIA
1 stop5h 59m
Delta
Deal found 6/13![Delta logo]()
$307
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.
Tue 7/77:55 pm
MIA
- BOS
Nonstop3h 38m
Delta
Tue 7/145:30 am
BOS
- MIA
1 stop6h 58m
Delta
Deal found 6/16![Delta logo]()
$307
Last-minute flights from Key Largo to BostonDiscover last-minute flight deals from Key Largo to Boston. Data last updated June 17, 2026 and is based on user searches.
Discover last-minute flight deals from Key Largo to Boston. Data last updated June 17, 2026 and is based on user searches.
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 6/235:26 pm
MIA
- BOS
1 stop8h 01m
Frontier
Fri 7/178:41 am
BOS
- MIA
1 stop11h 44m
Frontier
Deal found 6/15![Frontier logo]()
$247
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 6/235:26 pm
MIA
- BOS
1 stop8h 01m
Frontier
Sat 7/46:00 am
BOS
- MIA
1 stop11h 56m
Frontier
Deal found 6/15![Frontier logo]()
$253
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.
Tue 6/235:26 pm
MIA
- BOS
1 stop8h 01m
Frontier
Mon 6/296:00 am
BOS
- MIA
1 stop10h 31m
Frontier
Deal found 6/14![Frontier logo]()
$255
This eDestinos 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/235:26 pm
MIA
- BOS
1 stop8h 01m
Frontier
Wed 6/248:47 am
BOS
- MIA
1 stop11h 51m
Frontier
Deal found 6/14![Frontier logo]()
$265
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/245:26 pm
MIA
- BOS
1 stop8h 01m
Frontier
Tue 6/306:00 am
BOS
- MIA
1 stop7h 49m
Frontier
Deal found 6/17![Frontier logo]()
$243
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.
Wed 6/245:26 pm
MIA
- BOS
1 stop8h 01m
Frontier
Wed 7/88:41 am
BOS
- MIA
1 stop11h 49m
Frontier
Deal found 6/14![Frontier logo]()
$250
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/245:26 pm
MIA
- BOS
1 stop8h 01m
Frontier
Mon 6/296:00 am
BOS
- MIA
1 stop10h 31m
Frontier
Deal found 6/16![Frontier logo]()
$262
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/275:51 pm
MIA
- BOS
1 stop7h 36m
Frontier
Wed 7/16:00 am
BOS
- MIA
1 stop10h 31m
Frontier
Deal found 6/13![Frontier logo]()
$258
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/275:51 pm
MIA
- BOS
1 stop7h 36m
Frontier
Fri 7/312:01 pm
BOS
- MIA
1 stop11h 02m
Frontier
Deal found 6/13![Frontier logo]()
$263
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/275:51 pm
MIA
- BOS
1 stop7h 36m
Frontier
Mon 6/296:00 am
BOS
- MIA
1 stop10h 31m
Frontier
Deal found 6/13![Frontier logo]()
$264
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/277:00 am
MIA
- BOS
1 stop5h 14m
Delta
Tue 6/307:20 am
BOS
- MIA
Nonstop3h 29m
Delta
Deal found 6/13![Delta logo]()
$267
One-way flights from Key Largo to BostonSearch for one-way flight options from Key Largo to Boston. Find affordable one-way fares based on user searches. Data last updated June 17, 2026.
Search for one-way flight options from Key Largo to Boston. Find affordable one-way fares based on user searches. Data last updated June 17, 2026.
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 8/113:07 pm
MIA
- BOS
1 stop19h 57m
Frontier
Deal found 6/16![Frontier logo]()
$124
This eDestinos 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/102:56 pm
MIA
- BOS
1 stop21h 05m
Frontier
Deal found 6/16![Frontier logo]()
$125
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/245:26 pm
MIA
- BOS
1 stop8h 01m
Frontier
Deal found 6/17![Frontier logo]()
$126
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/76:42 pm
MIA
- BOS
1 stop13h 00m
Frontier
Deal found 6/17![Frontier logo]()
$127
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/205:51 pm
MIA
- BOS
1 stop7h 36m
Frontier
Deal found 6/17![Frontier logo]()
$128
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/107:55 pm
MIA
- BOS
Nonstop3h 38m
Delta
Deal found 6/15![Delta logo]()
$129
This Trip.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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/172:56 pm
MIA
- BOS
1 stop21h 05m
Frontier
Deal found 6/15![Frontier logo]()
$130
This Super.com 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/275:51 pm
MIA
- BOS
1 stop7h 36m
Frontier
Deal found 6/17![Frontier logo]()
$131
This American Airlines deal was found by Cheapflights users on 6/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/108:20 pm
MIA
- BOS
Nonstop3h 21m
American Airlines
Deal found 6/12![American Airlines logo]()
$132
This Super.com 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/33:00 pm
MIA
- BOS
1 stop20h 05m
Frontier
Deal found 6/13![Frontier logo]()
$133
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.
Sat 8/225:05 am
MIA
- BOS
1 stop6h 00m
Frontier
Deal found 6/16![Frontier logo]()
$134
This Flightnetwork 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/46:51 pm
MIA
- BOS
1 stop6h 36m
Frontier
Deal found 6/16![Frontier logo]()
$135
Find flight deals from Key Largo to Boston
Keep the following information in mind while searching for Key Largo to Boston flight deals. Data was last updated June 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $218 (Delta) |
One-way from | $124 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $367 |
Cheapflights Fare Finder
Customize your flight search to find flights from Key Largo to Boston 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 17, 2026.
Use the filters below to find and compare flights from Key Largo to Boston that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
MiamiBoston
MIA - BOS
MIABOS
Miami
Fri 9/25
7:58 pm-11:30 pm
Nonstop3h 32m
Boston Logan Intl
Sun 9/27
7:10 am-10:43 am
Nonstop3h 33m
$237
MiamiBoston
MIA - BOS
MIABOS
Miami
Thu 9/24
7:58 pm-11:30 pm
Nonstop3h 32m
Boston Logan Intl
Sun 9/27
7:10 am-10:43 am
Nonstop3h 33m
$243
MiamiBoston
MIA - BOS
MIABOS
Miami
Fri 9/4
11:50 am-3:22 pm
Nonstop3h 32m
Boston Logan Intl
Tue 9/8
3:05 pm-6:46 pm
Nonstop3h 41m
$247
MiamiBoston
MIA - BOS
MIABOS
Miami
Mon 7/20
7:55 pm-11:33 pm
Nonstop3h 38m
Boston Logan Intl
Wed 8/5
3:20 pm-7:03 pm
Nonstop3h 43m
$257
MiamiBoston
MIA - BOS
MIABOS
Miami
Tue 7/28
6:25 am-1:21 pm
1 stop6h 56m
Boston Logan Intl
Tue 8/4
7:20 am-10:52 am
Nonstop3h 32m
$267
MiamiBoston
MIA - BOS
MIABOS
Miami
Mon 7/20
7:07 am-1:35 pm
1 stop6h 28m
Boston Logan Intl
Tue 7/21
7:19 am-2:57 pm
1 stop7h 38m
$277
MiamiBoston
MIA - BOS
MIABOS
Miami
Sat 7/4
7:05 am-3:20 pm
2 stops8h 15m
Boston Logan Intl
Tue 7/7
5:35 am-2:25 pm
2 stops8h 50m
$287
MiamiBoston
MIA - BOS
MIABOS
Miami
Thu 10/29
7:55 pm-11:23 pm
Nonstop3h 28m
Boston Logan Intl
Wed 11/4
7:00 am-10:43 am
Nonstop3h 43m
$287
MiamiBoston
MIA - BOS
MIABOS
Miami
Tue 10/20
8:00 am-3:46 pm
1 stop7h 46m
Boston Logan Intl
Sat 10/24
1:00 pm-7:13 pm
1 stop6h 13m
$307
MiamiBoston
MIA - BOS
MIABOS
Miami
Sat 8/8
7:58 pm-11:36 pm
Nonstop3h 38m
Boston Logan Intl
Wed 8/19
8:55 am-2:54 pm
1 stop5h 59m
$307
Showing 1-10 of 22 resultsSorted by cheapest first
Best time to book a flight from Key Largo to Boston
Have a flexible travel schedule? Discover the best time to fly to Boston from Key Largo with our price prediction graph.
MIA-BOS
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 Boston
KE9-BOS
MIA-BOS
What is the cheapest time of day to fly from KE9 to BOS?
Find hourly flight availability from Key Largo to Boston. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 17, 2026.
One of the essential ways to save on airfare from Key Largo to Boston is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 36% on airfare.
Weekly flight availability from Key Largo to Boston
Explore weekly flight availability from Key Largo to Boston. 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 17, 2026.
The most flights from KE9 to BOS are scheduled on a Monday (29 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (18 on average).
How much does it cost to fly round-trip from Key Largo to Boston?
What is the cheapest day to fly from Key Largo to Boston?
Use this chart to determine the cheapest time to fly round-trip from Key Largo to Boston. Price data was last updated on June 13, 2026.
Travelers seeking maximum savings on their Key Largo to Boston flight should consider departing on Wednesday at noon when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing Boston
Get insights into the airlines that provide service to Boston. 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 Boston. Reviews last updated June 17, 2026.
See what other customers who have flown with Delta,United Airlines, andAmerican Airlines from Key Largo to Boston have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Crew
8.5
Overall
7.8
Comfort
7.8
Entertainment
7.8
Food
7.2
Reviews
1 / 20
6.0
Goodpilar,May 2025
RSW - ATL
Boarding
8.1
Crew
8.5
Overall
7.8
Comfort
7.8
Entertainment
7.8
Food
7.2
Reviews
1 / 20
6.0
Goodpilar,May 2025
RSW - ATL
Boarding
8.1
Crew
8.5
Overall
7.8
Comfort
7.8
Entertainment
7.8
Food
7.2
Reviews
1 / 20
6.0
Goodpilar,May 2025
RSW - ATL
Boarding
8.1
Crew
8.5
Overall
7.8
Comfort
7.8
Entertainment
7.8
Food
7.2
Reviews
1 / 20
6.0
Goodpilar,May 2025
RSW - ATL
Boarding
8.1
Crew
8.5
Overall
7.8
Comfort
7.8
Entertainment
7.8
Food
7.2
Reviews
1 / 20
6.0
Goodpilar,May 2025
RSW - ATL
Boarding
8.1
Crew
8.5
Overall
7.8
Comfort
7.8
Entertainment
7.8
Food
7.2
Reviews
1 / 20
6.0
Goodpilar,May 2025
RSW - ATL
Related info for your journey
Find useful and relevant information for your journey from Key Largo to Boston. 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 Boston?
Book flights to Boston if you plan to visit one of these locationsWaltham
Cambridge
Concord
Brockton
Watertown
Hampton Beach
Seekonk
Cranston
Warwick
Peabody
Auburn
York Beach
Chelsea
Londonderry
Dedham
Swansea
Old Orchard Beach
Lowell
Smithfield
Braintree
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for Key Largo to Boston
See prices for flight routes from nearby airports that may be better suited for you.
Other flights to Boston
Explore flights to Boston departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on June 17, 2026.
Complete your trip
Complete your trip to Boston by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Key Largo to Boston by cabin class
Find flights from Key Largo to Boston, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Key Largo and Boston flights
Browse other Key Largo and Boston flight options. Last updated on June 17, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Key Largo to Boston flights
Consider these flights traveling from Key Largo to Boston.
Top 6 airlines flying from Key Largo to Boston
Discover the top 6 airlines that operate flights from Key Largo to Boston. 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 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$65 | Average$190 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$96 | Average$121 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$107 | Average$286 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$117 | Average$321 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$136 | Average$324 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$186 | Average$377 | FlexibilityNo cancel fee | On-time69% |