How long is the flight from Portsmouth to Key Largo?

There are many flights that can get you from Portsmouth to Key Largo in 35h 10m. Fly via Delta to get the fastest option. The distance from Portsmouth to Key Largo is about 4381 mi.

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 £338. While the most popular route (Southampton Eastleigh - Miami) can be booked for £478 on average, our data indicates £1,501 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 Gulf Air (80%), Malaysia Airlines (77%) and KLM (73%).

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.

£325+ 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 30 October 2025.

Mon 10/1118:05SOU - MIA

1 stop25h 45mDelta

Mon 17/1117:15MIA - SOU

2 stops18h 45mDelta

Deal found 29/10£481

Wed 5/1117:30SOU - MIA

2 stops28h 40mDelta

Sat 15/1108:20MIA - SOU

2 stops19h 30mDelta

Deal found 29/10£485

Wed 5/1108:40SOU - MIA

2 stops17h 11mDelta

Tue 11/1112:36MIA - SOU

2 stops14h 34mDelta

Deal found 29/10£495

Thu 11/1218:05SOU - MIA

2 stops29h 20mVirgin Atlantic

Thu 18/1216:50MIA - SOU

1 stop19h 10mVirgin Atlantic

Deal found 27/10£513

Thu 11/1218:05SOU - MIA

1 stop25h 45mDelta

Thu 18/1216:50MIA - SOU

1 stop19h 10mDelta

Deal found 27/10£600

Fri 12/1208:40SOU - MIA

2 stops41h 30mVirgin Atlantic

Fri 19/1216:50MIA - SOU

1 stop19h 10mVirgin Atlantic

Deal found 28/10£616

Tue 4/1108:40SOU - MIA

2 stops17h 11mDelta

Mon 17/1110:28MIA - SOU

2 stops16h 42mDelta

Deal found 29/10£647

Tue 4/1108:40SOU - MIA

2 stops17h 11mDelta

Tue 11/1112:36MIA - SOU

2 stops14h 34mDelta

Deal found 29/10£656

Thu 11/1208:50SOU - MIA

2 stops19h 33mKLM

Thu 18/1211:23MIA - SOU

2 stops15h 42mKLM

Deal found 27/10£709

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 30 October 2025.

Mon 10/1108:40SOU - MIA

1 stop35h 10mDelta

Sun 16/1112:36MIA - SOU

2 stops14h 34mDelta

Deal found 29/10£481

Thu 11/1218:05SOU - MIA

2 stops29h 20mVirgin Atlantic

Thu 18/1216:50MIA - SOU

1 stop19h 10mVirgin Atlantic

Deal found 27/10£513

Sat 7/309:25SOU - MIA

2 stops18h 55mKLM

Wed 11/312:01MIA - SOU

2 stops16h 19mKLM

Deal found 27/10£556

Sun 9/1109:30SOU - MIA

2 stops18h 43mDelta

Sun 16/1111:27MIA - SOU

2 stops15h 43mDelta

Deal found 29/10£485

Sat 7/309:25SOU - MIA

2 stops17h 22mVirgin Atlantic

Wed 11/307:00MIA - SOU

2 stops30h 25mVirgin Atlantic

Deal found 26/10£514

Mon 10/1118:05SOU - MIA

2 stops29h 46mDelta

Mon 17/1112:00MIA - SOU

2 stops15h 10mDelta

Deal found 29/10£485

Sun 9/1109:30SOU - MIA

2 stops18h 43mDelta

Mon 17/1112:00MIA - SOU

2 stops15h 10mDelta

Deal found 29/10£485

Sat 7/309:25SOU - MIA

2 stops18h 55mDelta

Wed 11/317:59MIA - SOU

2 stops34h 06mDelta

Deal found 28/10£498

Sat 14/209:25SOU - MIA

1 stop34h 25mDelta

Sun 22/219:55MIA - SOU

2 stops40h 05mDelta

Deal found 28/10£532

Sun 15/217:45SOU - MIA

2 stops33h 02mDelta

Sun 22/219:55MIA - SOU

2 stops40h 05mDelta

Deal found 28/10£544

Mon 16/217:30SOU - MIA

2 stops28h 14mDelta

Sun 22/219:55MIA - SOU

2 stops40h 05mDelta

Deal found 28/10£544

Last-minute flights from Portsmouth to Key Largo
Discover last-minute flight deals from Portsmouth to Key Largo. Data last updated 30 October 2025 and is based on user searches.

Tue 4/1108:40SOU - MIA

2 stops17h 11mDelta

Mon 17/1110:28MIA - SOU

2 stops16h 42mDelta

Deal found 29/10£647

Tue 4/1108:40SOU - MIA

2 stops17h 11mDelta

Tue 11/1112:36MIA - SOU

2 stops14h 34mDelta

Deal found 29/10£656

Wed 5/1117:30SOU - MIA

2 stops28h 40mDelta

Sat 15/1108:20MIA - SOU

2 stops19h 30mDelta

Deal found 29/10£485

Wed 5/1108:40SOU - MIA

2 stops17h 11mDelta

Thu 13/1112:36MIA - SOU

2 stops14h 29mDelta

Deal found 29/10£495

Thu 6/1118:05SOU - MIA

2 stops29h 28mDelta

Sat 15/1111:27MIA - SOU

2 stops16h 23mDelta

Deal found 29/10£758

Thu 6/1118:05SOU - MIA

1 stop25h 45mDelta

Thu 13/1116:50MIA - SOU

1 stop19h 10mDelta

Deal found 29/10£811

Fri 7/1117:30SOU - MIA

2 stops34h 49mDelta

Tue 11/1111:27MIA - SOU

2 stops15h 43mDelta

Deal found 29/10£767

Sun 9/1109:30SOU - MIA

2 stops18h 43mDelta

Sat 15/1119:59MIA - SOU

2 stops31h 11mDelta

Deal found 29/10£806

Mon 10/1108:40SOU - MIA

1 stop35h 10mDelta

Sun 16/1112:36MIA - SOU

2 stops14h 34mDelta

Deal found 29/10£481

Mon 10/1118:05SOU - MIA

1 stop25h 45mDelta

Thu 13/1116:50MIA - SOU

1 stop19h 10mDelta

Deal found 29/10£830

Tue 11/1120:50SOU - MIA

2 stops22h 50mBritish Airways

Tue 18/1117:10MIA - SOU

3 stops15h 45mBritish Airways

Deal found 28/10£786

Thu 27/1120:10SOU - MIA

1 stop26h 00mAer Lingus

Thu 4/1209:37MIA - SOU

2 stops18h 08mAer Lingus

Deal found 28/10£808

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 30 October 2025.

Sun 19/412:00SOU - MIA

3 stops37h 00mMultiple Airlines

Deal found 27/10£325

Mon 20/419:25SOU - MIA

1 stop28h 55mMultiple Airlines

Deal found 28/10£392

Mon 20/420:00SOU - MIA

2 stops23h 30mAer Lingus

Deal found 28/10£411

Tue 30/1216:05SOU - MIA

1 stop30h 05mBritish Airways

Deal found 28/10£516

Mon 29/1220:50SOU - MIA

2 stops49h 20mBritish Airways

Deal found 28/10£538

Mon 8/1220:50SOU - MIA

2 stops27h 40mBritish Airways

Deal found 29/10£566

Wed 24/1213:50SOU - MIA

2 stops29h 50mBritish Airways

Deal found 29/10£582

Tue 23/1219:55SOU - MIA

2 stops23h 45mBritish Airways

Deal found 29/10£591

Cheap flight deals from Portsmouth to Key Largo

Round-trip from	£481
One-way from	£325
Popular in	February
Cheapest in	October
Average price	£617

Delta
10/11-16/11
3 total stops
49h 44m total
Portsmouth to Key Largo

Search Deals

19/4
3 total stops
37h 00m 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

Mon 10/11

08:40-14:50

1 stop35h 10m

Miami

Sun 16/11

12:36-08:10

2 stops14h 34m

£481

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Sun 9/11

09:30-23:13

2 stops18h 43m

Miami

Sun 16/11

11:27-08:10

2 stops15h 43m

£485

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Mon 10/11

18:05-18:51

2 stops29h 46m

Miami

Mon 17/11

12:00-08:10

2 stops15h 10m

£485

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Sun 9/11

09:30-23:13

2 stops18h 43m

Miami

Mon 17/11

12:00-08:10

2 stops15h 10m

£485

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Sat 7/3

09:25-23:20

2 stops18h 55m

Miami

Wed 11/3

17:59-08:05

2 stops34h 06m

£498

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Thu 11/12

18:05-18:25

2 stops29h 20m

Miami

Thu 18/12

16:50-17:00

1 stop19h 10m

£513

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Sat 7/3

09:25-21:47

2 stops17h 22m

Miami

Wed 11/3

07:00-17:25

2 stops30h 25m

£514

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Sat 14/2

09:25-14:50

1 stop34h 25m

Miami

Sun 22/2

19:55-17:00

2 stops40h 05m

£532

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Sun 15/2

17:45-21:47

2 stops33h 02m

Miami

Sun 22/2

19:55-17:00

2 stops40h 05m

£544

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Mon 16/2

17:30-16:44

2 stops28h 14m

Miami

Sun 22/2

19:55-17:00

2 stops40h 05m

£544

Flights are sorted by cheapest return flights first.

Deals found on 27/10

Showing 1-10 of 18 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 £233). Flying from Portsmouth to Key Largo in July is currently the most expensive (average of £358). 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.

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 35h 10m. Fly via Delta to get the fastest option. The distance from Portsmouth to Key Largo is about 4381 mi.
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 Gulf Air (80%), Malaysia Airlines (77%) and KLM (73%).
What are the cheapest flights from Portsmouth to Key Largo?
Looking at all options, your cheapest flight can be booked for £338. While the most popular route (Southampton Eastleigh - Miami) can be booked for £478 on average, our data indicates £1,501 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 £233). Flying from Portsmouth to Key Largo in July is currently the most expensive (average of £358). 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£280	Average£419	FlexibilityNo cancel fee	On-timeN/A	Search Norse Atlantic UK flights
SWISS	Cheapest£303	Average£477	FlexibilityNo cancel fee	On-time79%	Search SWISS flights
Scandinavian Airlines	Cheapest£317	Average£381	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
Icelandair	Cheapest£318	Average£414	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
TAP AIR PORTUGAL	Cheapest£332	Average£487	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
A.P.G.	Cheapest£348	Average£554	FlexibilityNo cancel fee	On-timeN/A	Search A.P.G. flights
United Airlines	Cheapest£350	Average£527	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Lufthansa	Cheapest£350	Average£486	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Air Europa	Cheapest£359	Average£462	FlexibilityNo cancel fee	On-time83%	Search Air Europa flights
British Airways	Cheapest£361	Average£506	FlexibilityNo cancel fee	On-time70%	Search British Airways 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 £325

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 19/4. 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 30 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 30 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 30 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 30 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.

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 30 October 2025.