How long is the flight from Portsmouth to Key Largo?

There are many flights that can get you from Portsmouth to Key Largo in 26h 40m. Fly via Delta or British Airways to get the fastest option. The distance from Portsmouth to Key Largo is about 4381 mi. Both multi-stop and direct flights can be found to your destination and back.

In terms of precipitation, rainfall in Key Largo ranges from 41.0 - 252.0 inches per month. September is typically the wettest month, when rainfall can reach 252.0 mm. January is typically the driest time to visit Key Largo when rainfall is around 41.0 mm.

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 29.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 20.0 C).

What are the cheapest flights from Portsmouth to Key Largo?

Looking at all options, your cheapest flight can be booked for £353. While the most popular route (Southampton Eastleigh - Miami) can be booked for £528 on average, our data indicates £2,069 when flying from Portsmouth to Key Largo.

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

The top 3 most reliable airlines when flying from Portsmouth to Key Largo are Malaysia Airlines (87%), Gulf Air (87%) and KLM (81%).

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

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

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

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

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

Yes. Cheapflights offers flight deals from Portsmouth 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.

£300+ Cheap Flights from Portsmouth to Key Largo

Cheap flight deals from Portsmouth to Key Largo

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

Cheapest flights from Portsmouth to Key Largo
Explore the most affordable flight options available from Portsmouth to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 September 2026.

Wed 4/1109:20 -

1 stop12h 50m

Wed 11/1119:05 -

1 stop11h 50m

Deal found 20/9£528

Mon 2/1117:45 -

1 stop26h 10m

Mon 9/1117:51 -

2 stops18h 14m

Deal found 18/9£574

Wed 4/1117:35 -

1 stop26h 40m

Wed 11/1117:05 -

2 stops19h 00m

Deal found 20/9£576

Mon 2/1108:40 -

2 stops17h 41m

Mon 9/1107:00 -

2 stops20h 10m

Deal found 18/9£578

Tue 3/1108:40 -

2 stops21h 13m

Tue 10/1110:34 -

2 stops16h 36m

Deal found 21/9£579

Sun 1/1109:20 -

1 stop12h 50m

Sun 8/1122:20 -

2 stops29h 00m

Deal found 17/9£587

Tue 3/1120:00 -

1 stop26h 10m

Sun 8/1122:20 -

2 stops29h 00m

Deal found 17/9£594

Thu 22/1017:20 -

2 stops32h 56m

Mon 2/1118:25 -

2 stops17h 40m

Deal found 20/9£609

Sun 1/1117:30 -

2 stops30h 15m

Mon 9/1117:51 -

2 stops18h 14m

Deal found 17/9£611

Fri 13/1119:40 -

2 stops28h 50m

Tue 17/1117:10 -

2 stops16h 25m

Deal found 17/9£623

Find flight deals from Portsmouth to Key Largo

Round-trip from	£528
One-way from	£300
Popular in	August
Cheapest in	January
Average price	£526

British Airways
4/11-11/11
2 total stops
24h 40m total
Portsmouth to Key Largo

Search Deals

23/11-31/12
2 total stops
53h 10m total
Portsmouth to Key Largo

Search Deals

Highest demand for flights based on searches. 4% potential increase in price (£20 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease (£7 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portsmouth to Key Largo that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SouthamptonMiami

SOU Southampton Eastleigh - MIA Miami

SOUMIA

Southampton Eastleigh

Thu 26/11

17:35-14:55

1 stop26h 20m

Miami

Wed 31/12

00:00-06:00

Nonstop0h 00m

£461

SouthamptonMiami

SOU Southampton Eastleigh - MIA Miami

SOUMIA

Southampton Eastleigh

Tue 24/11

08:40-00:57

2 stops21h 17m

Miami

Wed 31/12

00:00-06:00

Nonstop0h 00m

£468

SouthamptonMiami

SOU Southampton Eastleigh - MIA Miami

SOUMIA

Southampton Eastleigh

Mon 23/11

08:40-00:56

2 stops21h 16m

Miami

Wed 31/12

00:00-06:00

Nonstop0h 00m

£468

SouthamptonMiami

SOU Southampton Eastleigh - MIA Miami

SOUMIA

Southampton Eastleigh

Wed 25/11

08:40-23:00

2 stops19h 20m

Miami

Wed 31/12

00:00-06:00

Nonstop0h 00m

£468

Fastest return journey

SouthamptonMiami

SOU Southampton Eastleigh - MIA Miami

SOUMIA

Southampton Eastleigh

Sun 22/11

09:20-17:10

1 stop12h 50m

Miami

Wed 31/12

00:00-06:00

Nonstop0h 00m

£481

SouthamptonMiami

SOU Southampton Eastleigh - MIA Miami

SOUMIA

Southampton Eastleigh

Tue 17/11

20:00-17:10

1 stop26h 10m

Miami

Wed 31/12

00:00-06:00

Nonstop0h 00m

£488

SouthamptonMiami

SOU Southampton Eastleigh - MIA Miami

SOUMIA

Southampton Eastleigh

Sat 21/11

12:25-17:10

1 stop33h 45m

Miami

Wed 31/12

00:00-06:00

Nonstop0h 00m

£488

SouthamptonMiami

SOU Southampton Eastleigh - MIA Miami

SOUMIA

Southampton Eastleigh

Thu 19/11

20:00-17:10

1 stop26h 10m

Miami

Wed 31/12

00:00-06:00

Nonstop0h 00m

£490

SouthamptonMiami

SOU Southampton Eastleigh - MIA Miami

SOUMIA

Southampton Eastleigh

Tue 24/11

20:00-17:10

1 stop26h 10m

Miami

Wed 31/12

00:00-06:00

Nonstop0h 00m

£492

SouthamptonMiami

SOU Southampton Eastleigh - MIA Miami

SOUMIA

Southampton Eastleigh

Wed 4/11

17:35-15:15

1 stop26h 40m

Miami

Wed 11/11

17:05-17:05

2 stops19h 00m

£576

Flights are sorted by cheapest return flights first.

Deals found on 16/9

Showing 1-10 of 18 resultsSorted by cheapest first

Best time to book a flight from Portsmouth to Key Largo

Have a flexible travel schedule? Discover the best time to fly to Key Largo from Portsmouth with our price prediction graph.

SOU-MIA

Estimated return 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 Portsmouth to Key Largo

P0R-KE9

SOU-MIA

What is the cheapest time of day to fly from P0R to KE9?

When flying from Portsmouth to Key Largo, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Portsmouth to Key Largo

The most flights from P0R to KE9 are scheduled on a Monday (16 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (16 on average).

Related info for your journey

How long is the flight from Portsmouth to Key Largo?
There are many flights that can get you from Portsmouth to Key Largo in 26h 40m. Fly via Delta or British Airways to get the fastest option. The distance from Portsmouth to Key Largo is about 4381 mi. Both multi-stop and direct flights can be found to your destination and back.
What are the most reliable airlines from Portsmouth to Key Largo?
The top 3 most reliable airlines when flying from Portsmouth to Key Largo are Malaysia Airlines (87%), Gulf Air (87%) and KLM (81%).
What are the cheapest flights from Portsmouth to Key Largo?
Looking at all options, your cheapest flight can be booked for £353. While the most popular route (Southampton Eastleigh - Miami) can be booked for £528 on average, our data indicates £2,069 when flying from Portsmouth to Key Largo.
Can I find deals for flights from Portsmouth to Key Largo that include hotel bookings?
Yes. In addition to deals on Portsmouth to Key Largo flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Portsmouth to Key Largo?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portsmouth to Key Largo.
Can I find deals for business class flights from Portsmouth to Key Largo?
Yes. Cheapflights offers flight deals from Portsmouth 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Portsmouth to Key Largo

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Top 10 airlines flying from Portsmouth to Key Largo

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	Cheapest£297	Average£435	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Scandinavian Airlines	Cheapest£335	Average£475	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
SWISS	Cheapest£349	Average£470	FlexibilityNo cancel fee	On-time79%	Search SWISS flights
Air Canada	Cheapest£350	Average£537	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
United Airlines	Cheapest£360	Average£569	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Lufthansa	Cheapest£375	Average£482	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
TAP AIR PORTUGAL	Cheapest£379	Average£563	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Virgin Atlantic	Cheapest£382	Average£567	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
British Airways	Cheapest£386	Average£606	FlexibilityNo cancel fee	On-time70%	Search British Airways flights
Finnair	Cheapest£386	Average£600	FlexibilityNo cancel fee	On-time76%	Search Finnair flights

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How does Cheapflights help users find flights from Portsmouth to Key Largo?

Cheapflights helps you search for flights from Portsmouth to Key Largo via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Portsmouth to Key Largo?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Key Largo from Portsmouth.

Can Cheapflights find flights from Portsmouth to Key Largo with no change fees?

Certainly. Search results for flights to Key Largo from Portsmouth shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Portsmouth to Key Largo become cheaper?

Yes! Start tracking prices for Portsmouth to Key Largo flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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Cheap flights from Portsmouth to Key Largo from £300

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 23/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Portsmouth to Key Largo

Cheapest flights from Portsmouth to Key LargoExplore the most affordable flight options available from Portsmouth to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 September 2026.

Explore the most affordable flight options available from Portsmouth to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 September 2026.

Best flights from Portsmouth to Key LargoDiscover carefully curated flight deals from Portsmouth to Key Largo that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 21 September 2026.

Discover carefully curated flight deals from Portsmouth to Key Largo that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 21 September 2026.

Last-minute flights from Portsmouth to Key LargoDiscover last-minute flight deals from Portsmouth to Key Largo. Data last updated 21 September 2026 and is based on user searches.

Discover last-minute flight deals from Portsmouth to Key Largo. Data last updated 21 September 2026 and is based on user searches.

One-way flights from Portsmouth to Key LargoSearch for one-way flight options from Portsmouth to Key Largo. Find affordable one-way fares based on user searches. Data last updated 21 September 2026.

Search for one-way flight options from Portsmouth to Key Largo. Find affordable one-way fares based on user searches. Data last updated 21 September 2026.

Find flight deals from Portsmouth to Key Largo

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Use the filters below to find and compare flights from Portsmouth to Key Largo that are best for you.

Best time to book a flight from Portsmouth to Key Largo

Have a flexible travel schedule? Discover the best time to fly to Key Largo from Portsmouth with our price prediction graph.

Cheapflights Insights

What is the cheapest time of day to fly from P0R to KE9?

Find hourly flight availability from Portsmouth 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 21 September 2026.

When flying from Portsmouth to Key Largo, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Portsmouth to Key Largo

The most flights from P0R to KE9 are scheduled on a Monday (16 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (16 on average).

Related info for your journey

How long is the flight from Portsmouth to Key Largo?

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

What are the cheapest flights from Portsmouth to Key Largo?

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

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

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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Portsmouth to Key Largo

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Complete your trip

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Direct flights to Florida

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Search flights from Portsmouth to Key Largo by cabin class

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Portsmouth and Key Largo flights

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Portsmouth to Key Largo flights

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Can Cheapflights find flights from Portsmouth to Key Largo with no change fees?

Can Cheapflights notify me if prices for flights from Portsmouth to Key Largo become cheaper?

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Cheapest flights from Portsmouth to Key Largo
Explore the most affordable flight options available from Portsmouth to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 September 2026.

Best flights from Portsmouth to Key Largo
Discover carefully curated flight deals from Portsmouth to Key Largo that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 21 September 2026.

Last-minute flights from Portsmouth to Key Largo
Discover last-minute flight deals from Portsmouth to Key Largo. Data last updated 21 September 2026 and is based on user searches.

One-way flights from Portsmouth to Key Largo
Search for one-way flight options from Portsmouth to Key Largo. Find affordable one-way fares based on user searches. Data last updated 21 September 2026.