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$79+ 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 7/12. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — BOS
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from Key Largo to Boston Logan Intl are usually found in January or September, booked 44 days in advance, depart on a Friday or Thursday and return on a Thursday

Cheap 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 junio 12, 2025.

Round-trip from

$106
(Cheapflightsfares)

One-way from

$79
(Southwest)

Popular in

June

Cheapest in

January

Average price

$237
From Key Largo to Boston Logan Intl
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One-way flight from Key Largo to Boston Logan Intl
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Highest demand for flights based on searches. 17% potential increase in price ($38 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from Key Largo to Boston

Cheapest flights from Key Largo to Boston
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 junio 12, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 6/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/47:00 amMIA - BOS
Nonstop3h 30mSpirit Airlines
dom. 9/74:15 pmBOS - MIA
Nonstop3h 30mSpirit Airlines
Deal found 6/10$106
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/28:02 pmMIA - BOS
Nonstop3h 25mAmerican Airlines
mar. 10/219:19 amBOS - MIA
Nonstop3h 41mAmerican Airlines
Deal found 6/11$117
This JetBlue deal was found by Cheapflights users on 6/10. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/172:22 pmMIA - BOS
Nonstop3h 23mJetBlue
lun. 9/2210:03 amBOS - MIA
Nonstop3h 23mJetBlue
Deal found 6/10$122
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.
mar. 7/18:27 pmMIA - BOS
Nonstop3h 32mDelta
mar. 7/87:00 amBOS - MIA
Nonstop3h 30mDelta
Deal found 6/12$137
This Southwest deal was found by Cheapflights users on 6/10. 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.
mié. 9/311:45 amMIA - BOS
1 stop5h 20mSouthwest
mié. 9/1010:50 amBOS - MIA
1 stop5h 45mSouthwest
Deal found 6/10$151
This Cheapflightsfares deal was found by Cheapflights users on 6/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 10/57:00 amMIA - BOS
Nonstop3h 30mMultiple Airlines
dom. 10/1211:25 amBOS - MIA
Nonstop3h 36mMultiple Airlines
Deal found 6/11$161
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/912:47 pmMIA - BOS
1 stop23h 07mFrontier
dom. 10/1211:25 amBOS - MIA
Nonstop3h 36mFrontier
Deal found 6/12$176
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.
mar. 7/17:45 amMIA - BOS
1 stop5h 58mUnited Airlines
mar. 7/85:30 amBOS - MIA
1 stop6h 19mUnited Airlines
Deal found 6/12$267

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 junio 12, 2025.
Use the filters below to find and compare flights from Key Largo to Boston that are best for you.

Fly from

Key Largo

Fly to

Boston

Route

Depart

Return

Price

MiamiBoston

MIA - BOS

MIABOS

Miami

jue. 9/4

7:00 am-10:30 am

Nonstop3h 30m

Boston Logan Intl

dom. 9/7

4:15 pm-7:45 pm

Nonstop3h 30m

$106

MiamiBoston

MIA - BOS

MIABOS

Miami

sáb. 8/2

8:02 pm-11:27 pm

Nonstop3h 25m

Boston Logan Intl

mar. 10/21

9:19 am-1:00 pm

Nonstop3h 41m

$117

MiamiBoston

MIA - BOS

MIABOS

Miami

mar. 7/1

6:00 am-9:20 am

Nonstop3h 20m

Boston Logan Intl

sáb. 7/5

8:32 pm-11:59 pm

Nonstop3h 27m

$137

MiamiBoston

MIA - BOS

MIABOS

Miami

jue. 9/4

8:25 pm-11:59 pm

Nonstop3h 34m

Boston Logan Intl

sáb. 9/6

3:50 pm-7:30 pm

Nonstop3h 40m

$142

MiamiBoston

MIA - BOS

MIABOS

Miami

mié. 9/3

11:45 am-5:05 pm

1 stop5h 20m

Boston Logan Intl

mié. 9/10

10:50 am-4:35 pm

1 stop5h 45m

$151

MiamiBoston

MIA - BOS

MIABOS

Miami

sáb. 6/21

9:42 pm-8:06 am

1 stop10h 24m

Boston Logan Intl

jue. 6/26

9:44 am-1:28 pm

Nonstop3h 44m

$200

MiamiBoston

MIA - BOS

MIABOS

Miami

sáb. 8/2

9:42 pm-7:59 am

1 stop10h 17m

Boston Logan Intl

dom. 10/19

11:25 am-3:01 pm

Nonstop3h 36m

$216

MiamiBoston

MIA - BOS

MIABOS

Miami

mar. 7/1

6:22 am-1:43 pm

1 stop7h 21m

Boston Logan Intl

lun. 7/7

8:39 am-4:41 pm

1 stop8h 02m

$267

MiamiBoston

MIA - BOS

MIABOS

Miami

sáb. 7/12

7:00 am-1:40 pm

1 stop6h 40m

$79

MiamiBoston

MIA - BOS

MIABOS

Miami

jue. 6/26

8:45 pm-7:12 am

1 stop10h 27m

$80

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 16 results
1
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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.
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

How far ahead should I book a flight from Key Largo to Boston?

Use this chart to determine the optimal time to book a round-trip flight from Key Largo to Boston. Price data was last updated on June 9, 2025.

The price you pay for your flight from Key Largo to Boston may vary depending on when you book. For the best chance of a lower fare, look to book 44 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Key Largo to Boston?

Currently, January is the cheapest month in which you can book a flight from Key Largo to Boston (average of $218). Flying from Key Largo to Boston in June is currently the most expensive (average of $306). 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 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 junio 12, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Key Largo to Boston as you normally would.

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 8, 2025.

Travelers seeking maximum savings on their Key Largo to Boston flight should consider departing on Tuesday evenings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 junio 12, 2025.

The most flights from KE9 to BOS are scheduled on a Wednesday (32 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (19 on average).

Rainfall in Boston by month

Plan your trip to Boston by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Boston ranges from 3.1 - 4.0 inches per month. March is typically the wettest month, when rainfall can reach 4.0 in. July is typically the driest time to visit Boston when rainfall is around 3.1 in.

Temperature in Boston by month

Plan your trip to Boston by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Boston, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

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 junio 12, 2025.
To help decide which airline to fly from Key Largo to Boston, see what other customers have to say about Southwest, Delta and United Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Crew

8.6

Entertainment

7.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Southwest
8.0
Very good
4,287 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Crew

8.6

Entertainment

7.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Delta
8.0
Very good
7,950 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Crew

8.6

Entertainment

7.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
United Airlines
7.4
Good
8,790 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Crew

8.6

Entertainment

7.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
JetBlue
7.3
Good
2,925 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Crew

8.6

Entertainment

7.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,287 reviews

Food

7.1

Boarding

8.2

Crew

8.6

Entertainment

7.6

Comfort

8.0

Overall

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

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.

  • What airport do you fly into for flights to Boston from Key Largo?

    Boston Logan Intl (BOS) is the airport you will fly into if you book a flight from Key Largo to Boston. You should not have trouble finding flights to Logan Intl from Key Largo; the airport handles an average of 26 inbound flights from Key Largo per day. You should also have plenty of airline options to choose from since 7 airlines have flights to the Boston airport from Key Largo. It is only a 2.6 mi journey from Logan Intl (BOS) to Boston’s city center.

  • How popular is this Key Largo to Boston flight route?

    Flights from Key Largo to Boston Logan Intl have been viewed 30 times in the past calendar month.

  • What are the cheapest airlines to fly from Key Largo to Boston one-way?

    To fly one-way, consider booking your trip with Southwest, which is currently one of the cheapest options available, starting at $79. Spirit Airlines flights start at $80 while deals on JetBlue start at $86 one-way.

  • What are the most reliable airlines from Key Largo to Boston?

    Consider Frontier (100%), Republic Airways (100%) or Etihad Airways (99%) when booking your flight. These represent the most reliable airlines when flying from Key Largo to Boston.

  • What are the cheapest flights from Key Largo to Boston?

    On average you can expect to pay $1,382 for a flight from Key Largo to Boston. The cheapest flight overall is $74 while the most popular route, (Miami - Boston Logan Intl) is currently priced at $87.

  • Can I find deals for flights from Key Largo to Boston that include hotel bookings?

    Yes. In addition to deals on Key Largo to Boston flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Key Largo to Boston?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Key Largo to Boston.

  • Can I find deals for business class flights from Key Largo to Boston?

    Yes. Cheapflights offers flight deals from Key Largo to Boston by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Key Largo to Boston?

    Currently, January is the cheapest month in which you can book a flight from Key Largo to Boston (average of $218). Flying from Key Largo to Boston in June is currently the most expensive (average of $306). 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.

See more FAQs

Traveling to a place near Key Largo?

Book flights to Key Largo if you plan to visit one of these locations
Cambridge
Medford
Watertown
Warwick
Waltham
Framingham
Seabrook
Cranston
Randolph
Chestnut Hill
Lowell
Chelsea
Marlborough
Brockton
York Beach
Saco
Burlington
West Yarmouth
Smithfield
Swansea

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Top 7 airlines flying from Key Largo to Boston

Discover the top 7 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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$37Average$82FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$59Average$146FlexibilityNo cancel feeOn-time65%
JetBlueCheapest$76Average$307FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$88Average$310FlexibilityNo cancel feeOn-time71%
DeltaCheapest$89Average$263FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$178Average$178FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$198Average$288FlexibilityNo cancel feeOn-time69%

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