How long is the flight from Portsmouth to Key Largo?

There are many flights that can get you from Portsmouth to Key Largo in 19h 20m. 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 £325. While the most popular route (Southampton Eastleigh - Miami) can be booked for £493 on average, our data indicates £1,618 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 KLM (89%), Air France (87%) and Delta (87%).

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.

£253+ 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 27 November 2025.

Thu 4/1218:05SOU - MIA

1 stop25h 45mVirgin Atlantic

Tue 9/1216:50MIA - SOU

1 stop19h 10mVirgin Atlantic

Deal found 25/11£471

Wed 3/1208:40SOU - MIA

1 stop35h 10mDelta

Tue 9/1212:36MIA - SOU

2 stops14h 34mDelta

Deal found 26/11£484

Thu 4/1218:05SOU - MIA

1 stop25h 45mDelta

Tue 9/1210:32MIA - SOU

2 stops16h 38mDelta

Deal found 25/11£485

Thu 4/1218:05SOU - MIA

2 stops35h 41mMultiple Airlines

Tue 9/1214:11MIA - SOU

2 stops21h 49mMultiple Airlines

Deal found 25/11£489

Tue 2/1217:30SOU - MIA

2 stops28h 55mDelta

Tue 9/1212:36MIA - SOU

2 stops14h 34mDelta

Deal found 26/11£491

Wed 3/1217:30SOU - MIA

2 stops36h 16mDelta

Mon 8/1207:20MIA - SOU

2 stops19h 50mDelta

Deal found 26/11£495

Wed 3/1217:30SOU - MIA

1 stop26h 20mDelta

Wed 10/1207:20MIA - SOU

2 stops20h 00mDelta

Deal found 26/11£528

Tue 2/1217:30SOU - MIA

2 stops28h 55mDelta

Mon 8/1207:20MIA - SOU

2 stops19h 50mDelta

Deal found 26/11£565

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 27 November 2025.

Fri 30/109:00SOU - MIA

2 stops19h 20mDelta

Tue 3/211:39MIA - SOU

2 stops16h 11mDelta

Deal found 25/11£517

Wed 28/117:30SOU - MIA

2 stops30h 24mVirgin Atlantic

Sun 1/219:25MIA - SOU

2 stops32h 25mVirgin Atlantic

Deal found 25/11£527

Fri 30/109:00SOU - MIA

2 stops16h 44mDelta

Mon 2/208:15MIA - SOU

2 stops19h 35mDelta

Deal found 25/11£517

Fri 30/109:00SOU - MIA

2 stops20h 51mDelta

Sun 1/208:15MIA - SOU

2 stops19h 35mDelta

Deal found 25/11£523

Tue 27/109:25SOU - MIA

2 stops17h 38mDelta

Mon 2/212:02MIA - SOU

2 stops15h 48mDelta

Deal found 25/11£526

Tue 27/109:25SOU - MIA

2 stops29h 59mDelta

Tue 3/211:39MIA - SOU

2 stops16h 11mDelta

Deal found 25/11£526

Wed 28/109:25SOU - MIA

2 stops17h 16mDelta

Mon 2/219:25MIA - SOU

2 stops16h 35mDelta

Deal found 25/11£526

Wed 28/109:25SOU - MIA

2 stops17h 16mDelta

Sun 1/208:15MIA - SOU

2 stops19h 35mDelta

Deal found 25/11£533

Tue 27/109:25SOU - MIA

2 stops17h 16mDelta

Sat 31/119:59MIA - SOU

2 stops31h 51mDelta

Deal found 25/11£533

Tue 27/109:25SOU - MIA

2 stops20h 26mDelta

Sun 1/208:15MIA - SOU

2 stops19h 35mDelta

Deal found 25/11£533

Sat 31/109:25SOU - MIA

2 stops17h 38mDelta

Tue 3/216:50MIA - SOU

1 stop11h 00mDelta

Deal found 25/11£533

Last-minute flights from Portsmouth to Key Largo
Discover last-minute flight deals from Portsmouth to Key Largo. Data last updated 27 November 2025 and is based on user searches.

Tue 2/1217:30SOU - MIA

2 stops28h 55mDelta

Tue 9/1212:36MIA - SOU

2 stops14h 34mDelta

Deal found 26/11£491

Tue 2/1217:30SOU - MIA

2 stops28h 55mDelta

Mon 8/1207:20MIA - SOU

2 stops19h 50mDelta

Deal found 26/11£565

Wed 3/1208:40SOU - MIA

1 stop35h 10mDelta

Tue 9/1212:36MIA - SOU

2 stops14h 34mDelta

Deal found 26/11£484

Wed 3/1217:30SOU - MIA

2 stops36h 16mDelta

Mon 8/1207:20MIA - SOU

2 stops19h 50mDelta

Deal found 26/11£495

Wed 3/1217:30SOU - MIA

1 stop26h 20mDelta

Wed 10/1207:20MIA - SOU

2 stops20h 00mDelta

Deal found 26/11£528

Thu 4/1218:05SOU - MIA

1 stop25h 45mVirgin Atlantic

Tue 9/1216:50MIA - SOU

1 stop19h 10mVirgin Atlantic

Deal found 25/11£471

Thu 4/1218:05SOU - MIA

1 stop25h 45mDelta

Tue 9/1210:32MIA - SOU

2 stops16h 38mDelta

Deal found 25/11£485

Thu 4/1218:05SOU - MIA

2 stops35h 41mMultiple Airlines

Tue 9/1214:11MIA - SOU

2 stops21h 49mMultiple Airlines

Deal found 25/11£489

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 27 November 2025.

Thu 15/120:10SOU - MIA

2 stops52h 50mMultiple Airlines

Deal found 26/11£253

Thu 26/214:15SOU - MIA

2 stops34h 45mMultiple Airlines

Deal found 26/11£266

Thu 15/120:10SOU - MIA

1 stop26h 50mAer Lingus

Deal found 26/11£446

Thu 26/216:05SOU - MIA

1 stop30h 55mAer Lingus

Deal found 26/11£458

Thu 29/116:05SOU - MIA

1 stop30h 55mBritish Airways

Deal found 24/11£459

Wed 28/108:55SOU - MIA

2 stops15h 35mBritish Airways

Deal found 24/11£466

Fri 30/119:00SOU - MIA

2 stops27h 20mBritish Airways

Deal found 24/11£492

Fri 9/109:30SOU - MIA

1 stop13h 30mBritish Airways

Deal found 26/11£692

Tue 6/112:25SOU - MIA

1 stop34h 35mBritish Airways

Deal found 26/11£698

Cheap flight deals from Portsmouth to Key Largo

Round-trip from	£493
One-way from	£253
Popular in	February
Cheapest in	October
Average price	£870

KLM
9/1-16/1
4 total stops
54h 50m total
Portsmouth to Key Largo

Search Deals

15/1
2 total stops
52h 50m total
Portsmouth to Key Largo

Search Deals

Highest demand for flights based on searches. 4% potential increase in price (£27 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 November 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

Fri 30/1

09:00-23:20

2 stops19h 20m

Miami

Tue 3/2

11:39-08:50

2 stops16h 11m

£517

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Fri 30/1

09:00-20:44

2 stops16h 44m

Miami

Mon 2/2

08:15-08:50

2 stops19h 35m

£517

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Fri 30/1

09:00-00:51

2 stops20h 51m

Miami

Sun 1/2

08:15-08:50

2 stops19h 35m

£523

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Tue 27/1

09:25-22:03

2 stops17h 38m

Miami

Mon 2/2

12:02-08:50

2 stops15h 48m

£526

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Tue 27/1

09:25-10:24

2 stops29h 59m

Miami

Tue 3/2

11:39-08:50

2 stops16h 11m

£526

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Wed 28/1

09:25-21:41

2 stops17h 16m

Miami

Mon 2/2

19:25-17:00

2 stops16h 35m

£526

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Wed 28/1

17:30-18:54

2 stops30h 24m

Miami

Sun 1/2

19:25-08:50

2 stops32h 25m

£527

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Wed 28/1

09:25-21:41

2 stops17h 16m

Miami

Sun 1/2

08:15-08:50

2 stops19h 35m

£533

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Tue 27/1

09:25-21:41

2 stops17h 16m

Miami

Sat 31/1

19:59-08:50

2 stops31h 51m

£533

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Tue 27/1

09:25-00:51

2 stops20h 26m

Miami

Sun 1/2

08:15-08:50

2 stops19h 35m

£533

Flights are sorted by cheapest return flights first.

Deals found on 26/11

Showing 1-10 of 20 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 at midday. If you’re flexible enough to do this you can expect to save up to 12% 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 Thursday, which is when the least amount of flights are scheduled (13 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 19h 20m. 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 KLM (89%), Air France (87%) and Delta (87%).
What are the cheapest flights from Portsmouth to Key Largo?
Looking at all options, your cheapest flight can be booked for £325. While the most popular route (Southampton Eastleigh - Miami) can be booked for £493 on average, our data indicates £1,618 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

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£280	Average£422	FlexibilityNo cancel fee	On-timeN/A	Search Norse Atlantic UK flights
Delta	Cheapest£301	Average£648	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
Icelandair	Cheapest£302	Average£399	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
SWISS	Cheapest£304	Average£478	FlexibilityNo cancel fee	On-time79%	Search SWISS flights
Scandinavian Airlines	Cheapest£316	Average£375	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
TAP AIR PORTUGAL	Cheapest£332	Average£489	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
A.P.G.	Cheapest£348	Average£555	FlexibilityNo cancel fee	On-timeN/A	Search A.P.G. flights
United Airlines	Cheapest£350	Average£521	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Lufthansa	Cheapest£351	Average£479	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
Air Europa	Cheapest£360	Average£461	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 £253

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 15/1. 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 27 November 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 27 November 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 27 November 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 27 November 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 27 November 2025.