How long is the flight from Portsmouth to Key Largo?

There are many flights that can get you from Portsmouth to Key Largo in 25h 45m. Fly via KLM or Virgin Atlantic 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 £407. While the most popular route (Southampton Eastleigh - Miami) can be booked for £537 on average, our data indicates £1,469 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 Aeromexico (88%), Malaysia Airlines (87%) and Gulf Air (87%).

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

When booking a flight from Portsmouth to Key Largo, you may want to consider flying on A.P.G., American Airlines or Air Canada as they are the most popular for this route.

How far in advance should I book a flight from Portsmouth to Key Largo?

Find a great deal and save up to 28% by booking at least 53 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Portsmouth to Key Largo within the next two weeks, with the cheapest ticket starting at £434.

What is the cheapest month to fly from Portsmouth to Key Largo?

The best pricing can be found in the month of September. Prices to Key Largo from Portsmouth average £477. You can even find prices in September for less than £477, as users have found deals to Key Largo from as low as £278. The month of December appears to be one of the more expensive times to travel to Key Largo from Portsmouth. Flying in the targeted month can save you up to 26%.

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.

£491+ Flights from Portsmouth to Key Largo

Cheap flight deals from Portsmouth to Key Largo

Round-trip from	£491
Popular in	December
Cheapest in	September
Average price	£402

KLM
30/10-6/11
3 total stops
41h 34m total
Portsmouth to Key Largo

Search Deals

Highest demand for flights based on searches. 2% potential increase in price (£7 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2025

Search Deals

Find flight deals from Portsmouth to Key Largo

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 12 September 2025.

Thu 30/1018:05SOU - MIA

1 stop25h 45mKLM

Thu 6/1111:16MIA - SOU

2 stops15h 49mKLM

Deal found 12/9£491

Mon 27/1018:05SOU - MIA

1 stop25h 45mDelta

Mon 3/1111:16MIA - SOU

2 stops15h 54mDelta

Deal found 12/9£591

Sun 26/1020:10SOU - MIA

2 stops47h 30mMultiple Airlines

Sun 2/1112:20MIA - SOU

2 stops22h 15mMultiple Airlines

Deal found 11/9£599

Mon 27/1018:05SOU - MIA

2 stops28h 28mVirgin Atlantic

Mon 3/1108:30MIA - SOU

2 stops18h 40mVirgin Atlantic

Deal found 12/9£647

Mon 27/1018:10SOU - MIA

3 stops25h 30mMultiple Airlines

Mon 3/1113:50MIA - SOU

2 stops17h 05mMultiple Airlines

Deal found 12/9£648

Thu 30/1020:10SOU - MIA

2 stops23h 40mMultiple Airlines

Thu 6/1111:07MIA - SOU

3 stops27h 33mMultiple Airlines

Deal found 12/9£675

Mon 27/1018:10SOU - MIA

3 stops30h 20mBritish Airways

Mon 3/1117:10MIA - SOU

3 stops16h 00mBritish Airways

Deal found 12/9£695

Fri 24/1009:20SOU - MIA

2 stops20h 09mDelta

Sun 26/1007:10MIA - SOU

2 stops21h 00mDelta

Deal found 12/9£707

Sat 25/1016:25SOU - MIA

1 stop30h 45mMultiple Airlines

Sat 1/1119:35MIA - SOU

2 stops40h 00mMultiple Airlines

Deal found 10/9£773

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 12 September 2025.

Thu 30/1018:05SOU - MIA

1 stop25h 45mKLM

Thu 6/1111:16MIA - SOU

2 stops15h 49mKLM

Deal found 12/9£491

Sat 7/317:30SOU - MIA

1 stop26h 20mVirgin Atlantic

Wed 11/307:00MIA - SOU

2 stops30h 25mVirgin Atlantic

Deal found 10/9£537

Sat 7/309:25SOU - MIA

2 stops17h 22mDelta

Wed 11/314:03MIA - SOU

2 stops14h 17mDelta

Deal found 9/9£541

Thu 30/1020:10SOU - MIA

2 stops23h 40mMultiple Airlines

Thu 6/1111:07MIA - SOU

3 stops27h 33mMultiple Airlines

Deal found 12/9£675

Mon 27/1018:10SOU - MIA

3 stops30h 20mBritish Airways

Mon 3/1117:10MIA - SOU

3 stops16h 00mBritish Airways

Deal found 12/9£695

Mon 27/1018:05SOU - MIA

2 stops28h 28mVirgin Atlantic

Mon 3/1108:30MIA - SOU

2 stops18h 40mVirgin Atlantic

Deal found 12/9£647

Fri 24/1009:20SOU - MIA

2 stops20h 09mDelta

Sun 26/1007:10MIA - SOU

2 stops21h 00mDelta

Deal found 12/9£707

Last-minute flights from Portsmouth to Key Largo
Discover last-minute flight deals from Portsmouth to Key Largo. Data last updated 12 September 2025 and is based on user searches.

Fri 24/1009:20SOU - MIA

2 stops20h 09mDelta

Sun 26/1007:10MIA - SOU

2 stops21h 00mDelta

Deal found 12/9£707

Sat 25/1016:25SOU - MIA

1 stop30h 45mMultiple Airlines

Sat 1/1119:35MIA - SOU

2 stops40h 00mMultiple Airlines

Deal found 10/9£773

Sun 26/1020:10SOU - MIA

2 stops47h 30mMultiple Airlines

Sun 2/1112:20MIA - SOU

2 stops22h 15mMultiple Airlines

Deal found 11/9£599

Mon 27/1018:05SOU - MIA

1 stop25h 45mDelta

Mon 3/1111:16MIA - SOU

2 stops15h 54mDelta

Deal found 12/9£591

Mon 27/1018:05SOU - MIA

2 stops28h 28mVirgin Atlantic

Mon 3/1108:30MIA - SOU

2 stops18h 40mVirgin Atlantic

Deal found 12/9£647

Mon 27/1018:10SOU - MIA

3 stops25h 30mMultiple Airlines

Mon 3/1113:50MIA - SOU

2 stops17h 05mMultiple Airlines

Deal found 12/9£648

Mon 27/1018:10SOU - MIA

3 stops30h 20mBritish Airways

Mon 3/1117:10MIA - SOU

3 stops16h 00mBritish Airways

Deal found 12/9£695

Thu 30/1018:05SOU - MIA

1 stop25h 45mKLM

Thu 6/1111:16MIA - SOU

2 stops15h 49mKLM

Deal found 12/9£491

Thu 30/1020:10SOU - MIA

2 stops23h 40mMultiple Airlines

Thu 6/1111:07MIA - SOU

3 stops27h 33mMultiple Airlines

Deal found 12/9£675

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 12 September 2025.

Sun 15/214:55SOU - MIA

2 stops28h 45mBritish Airways

Deal found 10/9£797

Fri 13/209:30SOU - MIA

1 stop13h 30mBritish Airways

Deal found 10/9£817

Fri 19/919:55SOU - MIA

2 stops23h 30mBritish Airways

Deal found 11/9£1,079

Sat 14/209:25SOU - MIA

1 stop34h 25mDelta

Deal found 10/9£1,179

Thu 30/1019:55SOU - MIA

2 stops23h 45mBritish Airways

Deal found 10/9£2,817

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

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Thu 30/10

18:05-15:50

1 stop25h 45m

Miami

Thu 6/11

11:16-08:05

2 stops15h 49m

£491

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Sat 7/3

17:30-14:50

1 stop26h 20m

Miami

Wed 11/3

07:00-17:25

2 stops30h 25m

£537

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Sat 7/3

09:25-21:47

2 stops17h 22m

Miami

Wed 11/3

14:03-08:20

2 stops14h 17m

£541

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Mon 27/10

18:05-18:33

2 stops28h 28m

Miami

Mon 3/11

08:30-08:10

2 stops18h 40m

£647

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Thu 30/10

20:10-15:50

2 stops23h 40m

Miami

Thu 6/11

11:07-19:40

3 stops27h 33m

£675

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Mon 27/10

18:10-20:30

3 stops30h 20m

Miami

Mon 3/11

17:10-14:10

3 stops16h 00m

£695

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Fri 24/10

09:20-00:29

2 stops20h 09m

Miami

Sun 26/10

07:10-08:10

2 stops21h 00m

£707

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Sun 15/2

14:55-14:40

2 stops28h 45m

£797

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Fri 13/2

09:30-18:00

1 stop13h 30m

£817

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Sat 14/2

06:50-19:30

2 stops17h 40m

£839

Flights are sorted by cheapest return flights first.

Deals found on 10/9

Showing 1-10 of 13 results

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.

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

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

Currently, January is the cheapest month in which you can book a flight from Portsmouth to Key Largo (average of £559). Flying from Portsmouth to Key Largo in July is currently the most expensive (average of £760). 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 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.

What is the cheapest day to fly from Portsmouth to Key Largo?

Travellers seeking maximum savings on their Portsmouth to Key Largo flight should consider departing on Saturday mornings when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Portsmouth to Key Largo

The most flights from P0R to KE9 are scheduled on a Wednesday (24 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (23 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 25h 45m. Fly via KLM or Virgin Atlantic 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 Aeromexico (88%), Malaysia Airlines (87%) and Gulf Air (87%).
What are the cheapest flights from Portsmouth to Key Largo?
Looking at all options, your cheapest flight can be booked for £407. While the most popular route (Southampton Eastleigh - Miami) can be booked for £537 on average, our data indicates £1,469 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.
What is the cheapest month to book a flight from Portsmouth to Key Largo?
Currently, January is the cheapest month in which you can book a flight from Portsmouth to Key Largo (average of £559). Flying from Portsmouth to Key Largo in July is currently the most expensive (average of £760). 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

Browse thousands of different options on Cheapflights for your next trip

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
Norse Atlantic UK	Cheapest£269	Average£409	FlexibilityNo cancel fee	On-timeN/A	Search Norse Atlantic UK flights
SWISS	Cheapest£296	Average£466	FlexibilityNo cancel fee	On-time79%	Search SWISS flights
Scandinavian Airlines	Cheapest£315	Average£391	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
TAP AIR PORTUGAL	Cheapest£324	Average£477	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
A.P.G.	Cheapest£340	Average£541	FlexibilityNo cancel fee	On-timeN/A	Search A.P.G. flights
Icelandair	Cheapest£342	Average£439	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Lufthansa	Cheapest£342	Average£472	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
United Airlines	Cheapest£347	Average£531	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Air Europa	Cheapest£351	Average£451	FlexibilityNo cancel fee	On-time83%	Search Air Europa flights
Finnair	Cheapest£355	Average£498	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 £491

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 30/10. 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

Keep the following information in mind while searching for Portsmouth to Key Largo flight deals. Data was last updated 12 September 2025.

Round-trip from

Popular in

Cheapest in

Average price

Find 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 12 September 2025.

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 12 September 2025.

Cheapflights Fare Finder

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

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

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

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 12 September 2025.

What is the cheapest day to fly from Portsmouth to Key Largo?

Use this chart to determine the cheapest time to fly return from Portsmouth to Key Largo. Price data was last updated on 16 December 2024.

Weekly flight availability from Portsmouth to Key Largo

Related info for your journey

Find useful and relevant information for your journey from Portsmouth to Key Largo. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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?

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

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

Top 10 airlines flying from Portsmouth to Key Largo

Fly with Cheapflights

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

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

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 12 September 2025.