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

The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $52. However, be on the lookout for offers from JetBlue and American Airlines, as they are both options that can get you from Key Largo to Puerto Rico for a low price.

Weekly flight availability from Key Largo to Puerto Rico

The most flights from KE9 to PR0 are scheduled on a Friday (24 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (13 on average).

In terms of precipitation, rainfall in Puerto Rico ranges from 2.2 - 6.1 inches per month. November is typically the wettest month, when rainfall can reach 6.1 in. February is typically the driest time to visit Puerto Rico when rainfall is around 2.2 in.

If weather is an important factor for your trip to Puerto Rico, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 77.0 F).

What are the most popular routes from Key Largo to Puerto Rico?

Most travelers choose Miami - San Juan Luis Munoz Marin Intl, Miami - Aguadilla Borinquen or Miami - Culebra when deciding on the best route from Key Largo to Puerto Rico.

What are the cheapest flights from Key Largo to Puerto Rico?

The cheapest flight price from Key Largo to Puerto Rico is $77. On average you can expect to pay $310. The most popular route, (Miami - San Juan Luis Munoz Marin Intl), can usually be booked for $123.

What are the most reliable airlines from Key Largo to Puerto Rico?

Consider Royal Air Maroc (92%), GOL (92%) or Frontier (86%) when booking your flight. These represent the most reliable airlines when flying from Key Largo to Puerto Rico.

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

Frontier, American Airlines and JetBlue are the most popular airlines when flying from Key Largo to Puerto Rico.

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

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

How can I find direct flights from Key Largo to Puerto Rico?

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

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

Yes. Cheapflights offers flight deals from Key Largo to Puerto Rico 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 Key Largo to Puerto Rico

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Find flight deals from Key Largo to Puerto Rico

Popular in	June
Cheapest in	April
Average price	$235

Highest demand for flights based on searches. 13% potential increase in price ($41 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($7 potential savings vs. average RT price).

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Average for round-trip flights in October 2026

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Everything you need to know about your flight from Key Largo to Puerto Rico

Prices

Airlines

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

Unlike in the morning, when flights are generally more expensive, you can save up to 20% on flights from Key Largo to Puerto Rico by exploring options for tickets in the evening.

What is the cheapest day to fly from Key Largo to Puerto Rico?

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

Reviews of airlines servicing Puerto Rico

Peruse reviews from past customers who have flown with JetBlue,American Airlines, andFrontier from Key Largo to Puerto Rico to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

JetBlue

7.1

Good

3,066 reviews

Reviews

1 / 20

10.0

Excellent

Rashesh,Jul 2026

FLL - BDL

The entertainment is great. They announced that they charge for food and drinks but we're giving out for free

JetBlue

7.1

Good

3,066 reviews

JetBlue

7.1

Good

3,066 reviews

Reviews

1 / 20

10.0

Excellent

Rashesh,Jul 2026

FLL - BDL

The entertainment is great. They announced that they charge for food and drinks but we're giving out for free

American Airlines

7.0

Good

12,187 reviews

JetBlue

7.1

Good

3,066 reviews

Reviews

1 / 20

10.0

Excellent

Rashesh,Jul 2026

FLL - BDL

The entertainment is great. They announced that they charge for food and drinks but we're giving out for free

Frontier

5.5

Fair

2,515 reviews

JetBlue

7.1

Good

3,066 reviews

Reviews

1 / 20

10.0

Excellent

Rashesh,Jul 2026

FLL - BDL

The entertainment is great. They announced that they charge for food and drinks but we're giving out for free

Related info for your journey

What are the cheapest airlines to fly from Key Largo to Puerto Rico one-way?
The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $52. However, be on the lookout for offers from JetBlue and American Airlines, as they are both options that can get you from Key Largo to Puerto Rico for a low price.
What are the most popular routes from Key Largo to Puerto Rico?
Most travelers choose Miami - San Juan Luis Munoz Marin Intl, Miami - Aguadilla Borinquen or Miami - Culebra when deciding on the best route from Key Largo to Puerto Rico.
What are the most reliable airlines from Key Largo to Puerto Rico?
Consider Royal Air Maroc (92%), GOL (92%) or Frontier (86%) when booking your flight. These represent the most reliable airlines when flying from Key Largo to Puerto Rico.
What are the cheapest flights from Key Largo to Puerto Rico?
The cheapest flight price from Key Largo to Puerto Rico is $77. On average you can expect to pay $310. The most popular route, (Miami - San Juan Luis Munoz Marin Intl), can usually be booked for $123.
Can I find deals for flights from Key Largo to Puerto Rico that include hotel bookings?
Yes. In addition to deals on Key Largo to Puerto Rico flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Key Largo to Puerto Rico?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Key Largo to Puerto Rico.
Can I find deals for business class flights from Key Largo to Puerto Rico?
Yes. Cheapflights offers flight deals from Key Largo to Puerto Rico by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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Alternative routes for Key Largo to Puerto Rico

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Top 5 airlines flying from Key Largo to Puerto Rico

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$99	Average$221	FlexibilityNo cancel fee	On-time62%
JetBlue	Cheapest$100	Average$307	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$108	Average$108	FlexibilityNo cancel fee	On-timeN/A
Southwest	Cheapest$200	Average$301	FlexibilityNo cancel fee	On-time63%
American Airlines	Cheapest$229	Average$491	FlexibilityNo cancel fee	On-time71%

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Cheap flights from Key Largo, FL to Puerto Rico

Find cheap flights from Key Largo to Puerto Rico with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Find flight deals from Key Largo to Puerto Rico

Popular in

Cheapest in

Average price

Cheapflights Insights

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

Unlike in the morning, when flights are generally more expensive, you can save up to 20% on flights from Key Largo to Puerto Rico by exploring options for tickets in the evening.

What is the cheapest day to fly from Key Largo to Puerto Rico?

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

Weekly flight availability from Key Largo to Puerto Rico

The most flights from KE9 to PR0 are scheduled on a Friday (24 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (13 on average).

Reviews of airlines servicing Puerto Rico

Peruse reviews from past customers who have flown with JetBlue,American Airlines, andFrontier from Key Largo to Puerto Rico to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

What are the most popular routes from Key Largo to Puerto Rico?

What are the most reliable airlines from Key Largo to Puerto Rico?

What are the cheapest flights from Key Largo to Puerto Rico?

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

How can I find direct flights from Key Largo to Puerto Rico?

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

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 Key Largo to Puerto Rico

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

Complete your trip

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

Search flights from Key Largo to Puerto Rico by cabin class

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

Key Largo and Puerto Rico flights

Browse other Key Largo and Puerto Rico flight options. Last updated on October 26, 2026.

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