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 Delta 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 £335. While the most popular route (Southampton Eastleigh - Miami) can be booked for £569 on average, our data indicates £1,538 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 (100%), Gulf Air (77%) and Malaysia Airlines (75%).

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.

£401+ Flights from Portsmouth to Key Largo

Find flight deals from Portsmouth to Key Largo

Enter your travel dates to find the best prices.

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 15 October 2025.

Sat 13/1217:30SOU - MIA

1 stop26h 20mDelta

Wed 24/1217:45MIA - SOU

2 stops33h 20mDelta

Deal found 14/10£554

Sat 13/1217:30SOU - MIA

1 stop26h 20mDelta

Mon 22/1210:21MIA - SOU

2 stops25h 39mDelta

Deal found 14/10£556

Thu 27/1118:05SOU - MIA

1 stop25h 45mVirgin Atlantic

Thu 4/1207:07MIA - SOU

2 stops19h 58mVirgin Atlantic

Deal found 13/10£569

Thu 27/1108:50SOU - MIA

2 stops20h 56mDelta

Thu 4/1207:00MIA - SOU

2 stops20h 05mDelta

Deal found 13/10£573

Sun 14/1209:30SOU - MIA

2 stops17h 44mDelta

Wed 24/1217:45MIA - SOU

2 stops33h 20mDelta

Deal found 14/10£575

Mon 8/1218:05SOU - MIA

1 stop25h 45mDelta

Thu 18/1215:50MIA - SOU

2 stops20h 10mDelta

Deal found 14/10£576

Thu 27/1108:50SOU - MIA

2 stops20h 56mKLM

Thu 4/1211:23MIA - SOU

2 stops15h 42mKLM

Deal found 13/10£579

Tue 23/1217:30SOU - MIA

2 stops29h 53mDelta

Thu 1/111:50MIA - SOU

2 stops15h 15mDelta

Deal found 14/10£590

Tue 9/1208:40SOU - MIA

2 stops17h 11mDelta

Thu 18/1215:50MIA - SOU

2 stops20h 10mDelta

Deal found 14/10£601

Tue 16/1208:40SOU - MIA

2 stops17h 11mDelta

Wed 24/1217:45MIA - SOU

2 stops33h 20mDelta

Deal found 14/10£608

Thu 11/1218:05SOU - MIA

1 stop25h 45mDelta

Mon 22/1210:21MIA - SOU

2 stops25h 39mDelta

Deal found 14/10£612

Thu 4/1218:05SOU - MIA

2 stops31h 46mDelta

Sat 13/1208:20MIA - SOU

2 stops19h 30mDelta

Deal found 14/10£614

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 15 October 2025.

Wed 7/117:30SOU - MIA

1 stop26h 20mDelta

Sun 18/116:50MIA - SOU

1 stop11h 00mDelta

Deal found 14/10£544

Thu 27/1118:05SOU - MIA

1 stop25h 45mVirgin Atlantic

Thu 4/1207:07MIA - SOU

2 stops19h 58mVirgin Atlantic

Deal found 13/10£569

Thu 27/1108:50SOU - MIA

2 stops20h 56mKLM

Thu 4/1211:23MIA - SOU

2 stops15h 42mKLM

Deal found 13/10£579

Wed 7/117:30SOU - MIA

1 stop26h 20mDelta

Sat 17/112:01MIA - SOU

2 stops24h 14mDelta

Deal found 14/10£560

Fri 6/317:30SOU - MIA

2 stops30h 25mVirgin Atlantic

Tue 10/314:03MIA - SOU

2 stops22h 57mVirgin Atlantic

Deal found 13/10£581

Sun 4/118:05SOU - MIA

2 stops29h 50mDelta

Tue 13/116:50MIA - SOU

1 stop19h 10mDelta

Deal found 14/10£564

Thu 27/1118:05SOU - MIA

1 stop25h 45mDelta

Thu 4/1216:50MIA - SOU

1 stop19h 10mDelta

Deal found 13/10£569

Sun 14/1209:30SOU - MIA

2 stops17h 44mDelta

Wed 24/1217:45MIA - SOU

2 stops33h 20mDelta

Deal found 14/10£575

Mon 15/1208:40SOU - MIA

2 stops17h 11mDelta

Thu 25/1212:45MIA - SOU

2 stops14h 20mDelta

Deal found 14/10£575

Fri 6/317:30SOU - MIA

2 stops28h 14mDelta

Tue 10/317:50MIA - SOU

1 stop19h 10mDelta

Deal found 13/10£581

Last-minute flights from Portsmouth to Key Largo
Discover last-minute flight deals from Portsmouth to Key Largo. Data last updated 15 October 2025 and is based on user searches.

Mon 20/1017:35SOU - MIA

2 stops32h 52mDelta

Thu 30/1008:30MIA - SOU

2 stops19h 35mDelta

Deal found 13/10£723

Mon 10/1118:05SOU - MIA

1 stop25h 45mDelta

Sun 16/1107:15MIA - SOU

2 stops19h 55mDelta

Deal found 14/10£615

Mon 10/1118:05SOU - MIA

3 stops31h 50mMultiple Airlines

Sun 16/1117:15MIA - SOU

3 stops33h 55mMultiple Airlines

Deal found 14/10£635

Thu 27/1118:05SOU - MIA

1 stop25h 45mVirgin Atlantic

Thu 4/1207:07MIA - SOU

2 stops19h 58mVirgin Atlantic

Deal found 13/10£569

Thu 27/1108:50SOU - MIA

2 stops20h 56mDelta

Thu 4/1207:00MIA - SOU

2 stops20h 05mDelta

Deal found 13/10£573

Thu 27/1108:50SOU - MIA

2 stops20h 56mKLM

Thu 4/1211:23MIA - SOU

2 stops15h 42mKLM

Deal found 13/10£579

Fri 28/1109:30SOU - MIA

1 stop12h 40mAer Lingus

Fri 5/1222:00MIA - SOU

2 stops29h 45mAer Lingus

Deal found 14/10£671

Fri 28/1117:30SOU - MIA

2 stops30h 22mVirgin Atlantic

Fri 5/1207:07MIA - SOU

2 stops20h 43mVirgin Atlantic

Deal found 14/10£705

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 15 October 2025.

Thu 27/1120:10SOU - MIA

3 stops28h 10mMultiple Airlines

Deal found 12/10£401

Thu 27/1116:05SOU - MIA

1 stop30h 05mAer Lingus

Deal found 12/10£482

Mon 20/1020:00SOU - MIA

2 stops42h 05mAer Lingus

Deal found 12/10£534

Fri 7/1120:00SOU - MIA

2 stops28h 30mBritish Airways

Deal found 13/10£718

Sun 26/1018:25SOU - MIA

3 stops25h 15mBritish Airways

Deal found 12/10£883

Sun 19/1020:00SOU - MIA

2 stops23h 30mBritish Airways

Deal found 11/10£1,132

Cheap flight deals from Portsmouth to Key Largo

Round-trip from	£544
One-way from	£401
Popular in	February
Cheapest in	October
Average price	£613

Delta
7/1-18/1
2 total stops
37h 20m total
Portsmouth to Key Largo

Search Deals

27/11
3 total stops
28h 10m total
Portsmouth to Key Largo

Search Deals

Highest demand for flights based on searches. 4% potential increase in price (£29 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 6% potential price decrease (£39 potential savings vs. average return price).

Search Deals

Average for round-trip flights in October 2025

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

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Wed 7/1

17:30-14:50

1 stop26h 20m

Miami

Sun 18/1

16:50-08:50

1 stop11h 00m

£544

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Wed 7/1

17:30-14:50

1 stop26h 20m

Miami

Sat 17/1

12:01-17:15

2 stops24h 14m

£560

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Sun 4/1

18:05-18:55

2 stops29h 50m

Miami

Tue 13/1

16:50-17:00

1 stop19h 10m

£564

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Thu 27/11

18:05-14:50

1 stop25h 45m

Miami

Thu 4/12

07:07-08:05

2 stops19h 58m

£569

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Thu 27/11

18:05-14:50

1 stop25h 45m

Miami

Thu 4/12

16:50-17:00

1 stop19h 10m

£569

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Sun 14/12

09:30-22:14

2 stops17h 44m

Miami

Wed 24/12

17:45-08:05

2 stops33h 20m

£575

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Mon 15/12

08:40-20:51

2 stops17h 11m

Miami

Thu 25/12

12:45-08:05

2 stops14h 20m

£575

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Thu 27/11

08:50-00:46

2 stops20h 56m

Miami

Thu 4/12

11:23-08:05

2 stops15h 42m

£579

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Fri 6/3

17:30-18:55

2 stops30h 25m

Miami

Tue 10/3

14:03-17:00

2 stops22h 57m

£581

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Fri 6/3

17:30-16:44

2 stops28h 14m

Miami

Tue 10/3

17:50-17:00

1 stop19h 10m

£581

Flights are sorted by cheapest return flights first.

Deals found on 12/10

Showing 1-10 of 15 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, May is the cheapest month in which you can book a flight from Portsmouth to Key Largo (average of £231). Flying from Portsmouth to Key Largo in November is currently the most expensive (average of £361). 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?

A simple way to save on the total cost of your ticket is to fly from Portsmouth to Key Largo in the afternoon. If you’re flexible enough to do this you can expect to save up to 13% on your trip compared to booking a flight in the evening.

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 Monday evenings when fares are most often at their lowest. Wednesday evenings 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 Monday (24 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (20 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 Delta 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 (100%), Gulf Air (77%) and Malaysia Airlines (75%).
What are the cheapest flights from Portsmouth to Key Largo?
Looking at all options, your cheapest flight can be booked for £335. While the most popular route (Southampton Eastleigh - Miami) can be booked for £569 on average, our data indicates £1,538 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, May is the cheapest month in which you can book a flight from Portsmouth to Key Largo (average of £231). Flying from Portsmouth to Key Largo in November is currently the most expensive (average of £361). 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

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Top 10 airlines flying from Portsmouth to Key Largo

Airline	Cheapest	Average	Flexibility	On-time
Norse Atlantic UK	Cheapest£279	Average£417	FlexibilityNo cancel fee	On-timeN/A	Search Norse Atlantic UK flights
SWISS	Cheapest£302	Average£474	FlexibilityNo cancel fee	On-time79%	Search SWISS flights
Delta	Cheapest£310	Average£769	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
Scandinavian Airlines	Cheapest£315	Average£383	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
Icelandair	Cheapest£316	Average£415	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
TAP AIR PORTUGAL	Cheapest£330	Average£486	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
A.P.G.	Cheapest£346	Average£551	FlexibilityNo cancel fee	On-timeN/A	Search A.P.G. flights
United Airlines	Cheapest£347	Average£531	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Lufthansa	Cheapest£348	Average£483	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Air Europa	Cheapest£357	Average£455	FlexibilityNo cancel fee	On-time83%	Search Air Europa 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 £401

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 27/11. Fares are subject to change and may not be available on all flights or dates of travel.

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 15 October 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 15 October 2025.

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 15 October 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

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 15 October 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

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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 15 October 2025.