How popular is this Boston to Key Largo flight route?

The Boston Logan Intl to Key Largo flight path was viewed by 206 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

$78 is the cheapest one-way deal found within the past few days, from JetBlue. You may also be able to find cheap deals on Delta and Southwest, with prices starting from $84 and $96, respectively.

Weekly flight availability from Boston to Key Largo

The most flights from BOS to KE9 are scheduled on a Monday (21 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (9 on average).

In terms of precipitation, rainfall in Key Largo ranges from 1.6 - 9.9 inches per month. September is typically the wettest month, when rainfall can reach 9.9 in. January is typically the driest time to visit Key Largo when rainfall is around 1.6 in.

If weather is an important factor for your trip to Key Largo, 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 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 68.0 F).

What are the cheapest flights from Boston to Key Largo?

The cheapest flight price from Boston to Key Largo is $159. On average you can expect to pay $1,304. The most popular route, (Boston Logan Intl - Miami), can usually be booked for $159.

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

Before booking your flight to Key Largo from Boston, check out the most reliable airlines to get you to your destination on time: Japan Airlines (89%), EL AL (88%), Virgin Atlantic( 74%).

What are the most popular airlines that fly from Boston to Key Largo?

When booking a flight from Boston to Key Largo, you may want to consider flying on American Airlines, Delta or JetBlue as they are the most popular for this route.

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

If you book a flight to Key Largo from Boston, you will be flying from Logan Intl, which is the city’s only airport. Boston Logan Intl (BOS) is located 2.6 mi from the center of Boston. There are 13 flights from Logan Intl to Key Largo per day from 7 different airlines.

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

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

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

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

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

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

Find Cheap Flights from Boston to Key Largo

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Cheapflights Tip: The best prices from Boston Logan Intl to Key Largo are usually found in January or March, booked 53 days in advance, depart on a Sunday or Saturday and return on a Thursday

Find flight deals from Boston to Key Largo

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Popular in	December
Cheapest in	January
Average price	$334

Provider with most accurate pricing for Boston Logan Intl-Miami flight deals.

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Highest demand for flights based on searches. 0% potential increase in price ($1 potential increase over avg. RT price).

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Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).

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Average for round-trip flights in September 2026

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Everything you need to know about your flight from Boston to Key Largo

Prices

Airlines

What is the cheapest time of day to fly from BOS to KE9?

It’s typically best to fly out from Boston to Key Largo in the evening. Doing so could potentially save you 32% 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?

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.

Reviews of airlines servicing Key Largo

Get a feel of what it's like to fly with Southwest,Delta, andJetBlue 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.

Southwest

8.0

Very good

4,203 reviews

Reviews

1 / 20

6.0

Good

Scott,Feb 2026

HOU - FLL

Delayed by 45 minutes leaving Houston, making a 3.5 hour layover that much longer.

Southwest

8.0

Very good

4,203 reviews

Southwest

8.0

Very good

4,203 reviews

Reviews

1 / 20

6.0

Good

Scott,Feb 2026

HOU - FLL

Delayed by 45 minutes leaving Houston, making a 3.5 hour layover that much longer.

Delta

7.8

Good

8,610 reviews

Southwest

8.0

Very good

4,203 reviews

Reviews

1 / 20

6.0

Good

Scott,Feb 2026

HOU - FLL

Delayed by 45 minutes leaving Houston, making a 3.5 hour layover that much longer.

JetBlue

7.1

Good

3,042 reviews

Southwest

8.0

Very good

4,203 reviews

Reviews

1 / 20

6.0

Good

Scott,Feb 2026

HOU - FLL

Delayed by 45 minutes leaving Houston, making a 3.5 hour layover that much longer.

American Airlines

7.0

Good

12,097 reviews

Southwest

8.0

Very good

4,203 reviews

Reviews

1 / 20

6.0

Good

Scott,Feb 2026

HOU - FLL

Delayed by 45 minutes leaving Houston, making a 3.5 hour layover that much longer.

Frontier

5.6

Fair

2,567 reviews

Southwest

8.0

Very good

4,203 reviews

Reviews

1 / 20

6.0

Good

Scott,Feb 2026

HOU - FLL

Delayed by 45 minutes leaving Houston, making a 3.5 hour layover that much longer.

Related info for your journey

What airport do you fly from for flights from Boston to Key Largo?
If you book a flight to Key Largo from Boston, you will be flying from Logan Intl, which is the city’s only airport. Boston Logan Intl (BOS) is located 2.6 mi from the center of Boston. There are 13 flights from Logan Intl to Key Largo per day from 7 different airlines.
How popular is this Boston to Key Largo flight route?
The Boston Logan Intl to Key Largo flight path was viewed by 206 users in the past month. Keep an eye out for changes in search interest prior to high and low season.
What are the cheapest airlines to fly from Boston to Key Largo one-way?
$78 is the cheapest one-way deal found within the past few days, from JetBlue. You may also be able to find cheap deals on Delta and Southwest, with prices starting from $84 and $96, respectively.
What are the most reliable airlines from Boston to Key Largo?
Before booking your flight to Key Largo from Boston, check out the most reliable airlines to get you to your destination on time: Japan Airlines (89%), EL AL (88%), Virgin Atlantic( 74%).
What are the cheapest flights from Boston to Key Largo?
The cheapest flight price from Boston to Key Largo is $159. On average you can expect to pay $1,304. The most popular route, (Boston Logan Intl - Miami), can usually be booked for $159.
Can I find deals for flights from Boston to Key Largo that include hotel bookings?
Yes. In addition to deals on Boston to Key Largo flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Boston to Key Largo?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Key Largo.
Can I find deals for business class flights from Boston to Key Largo?
Yes. Cheapflights offers flight deals from Boston to Key Largo by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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Top 7 airlines flying from Boston to Key Largo

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$51	Average$266	FlexibilityNo cancel fee	On-time62%
Allegiant Air	Cheapest$61	Average$170	FlexibilityNo cancel fee	On-time88%
JetBlue	Cheapest$117	Average$380	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$137	Average$350	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$196	Average$344	FlexibilityNo cancel fee	On-time69%
American Airlines	Cheapest$198	Average$396	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$216	Average$483	FlexibilityNo cancel fee	On-time63%

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Cheap flights from Boston (BOS) to Key Largo, FL

Find cheap flights from Boston to Key Largo with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Find flight deals from Boston to Key Largo

Most accurate provider

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Popular in

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Cheapflights Insights

What is the cheapest time of day to fly from BOS to KE9?

It’s typically best to fly out from Boston to Key Largo in the evening. Doing so could potentially save you 32% 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?

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

The most flights from BOS to KE9 are scheduled on a Monday (21 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (9 on average).

Reviews of airlines servicing Key Largo

Get a feel of what it's like to fly with Southwest,Delta, andJetBlue 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.

Related info for your journey

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

How popular is this Boston to Key Largo flight route?

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

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

What are the cheapest flights from Boston to Key Largo?

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

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

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Boston to Key Largo

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Key Largo by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Boston to Key Largo by cabin class

Find flights from Boston to Key Largo, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Boston and Key Largo flights

Browse other Boston and Key Largo flight options. Last updated on September 30, 2026.

Other flights from Boston

Browse through other flights departing from Boston. Flights are based on user searches made on Cheapflights and were last updated on September 30, 2026.

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Top 7 airlines flying from Boston to Key Largo

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