HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Portsmouth

$484+ Cheap flights from Key Largo, FL to Portsmouth, England

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 5/29. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — LHR
Feb 27 — Mar 61
Thu 2/27
Thu 3/6
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Key Largo to Portsmouth with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Key Largo to Portsmouth

Keep the following information in mind while searching for Key Largo to Portsmouth flight deals. Data was last updated February 22, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$786
(Delta)

One-way from

$484
(Mytrip)

Popular in

December

Cheapest in

February

Average price

$533
Provider with most accurate pricing for Miami-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Miami-London (LON) flights.
Search Deals
From Key Largo to Portsmouth
Search Deals
One-way flight from Key Largo to Portsmouth
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($18 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2025
Search Deals

Find flight deals from Key Largo to Portsmouth

Cheapest flights from Key Largo to Portsmouth
Explore the most affordable flight options available from Key Largo to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 22, 2025.

This Delta deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/83:55 pmMIA - SOU
1 stop11h 50mDelta
Mon 4/149:20 amSOU - MIA
1 stop33h 35mDelta
Deal found 2/20$786
This easyJet worldwide deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure easyJet worldwide is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/109:35 pmMIA - SOU
1 stop16h 20mMultiple Airlines
Mon 4/147:25 pmSOU - MIA
1 stop28h 55mMultiple Airlines
Deal found 2/22$811
This Gurufare deal was found by Cheapflights users on 2/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/58:38 amMIA - SOU
2 stops43h 32mAer Lingus
Sat 4/124:25 pmSOU - MIA
2 stops45h 44mAer Lingus
Deal found 2/22$1,076
This KLM deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/411:15 amMIA - SOU
2 stops16h 30mKLM
Thu 6/199:20 amSOU - MIA
2 stops20h 40mKLM
Deal found 2/21$1,111
This British Airways deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/89:40 amMIA - SOU
2 stops21h 20mBritish Airways
Wed 7/169:10 amSOU - MIA
2 stops29h 30mBritish Airways
Deal found 2/21$2,193

Find flights from Key Largo to Portsmouth within your budget

Customize your flight search to find flights from Key Largo to Portsmouth that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 22, 2025.

Fly from

Key Largo

Fly to

Portsmouth

Route

Depart

Return

Price

MiamiSouthampton

MIA - SOU

MIASOU

Miami

Tue 4/8

3:55 pm-8:45 am

1 stop11h 50m

Southampton Eastleigh

Mon 4/14

9:20 am-1:55 pm

1 stop33h 35m

$786

MiamiSouthampton

MIA - SOU

MIASOU

Miami

Thu 4/10

9:35 pm-6:55 pm

1 stop16h 20m

Southampton Eastleigh

Mon 4/14

7:25 pm-7:20 pm

1 stop28h 55m

$811

MiamiSouthampton

MIA - SOU

MIASOU

Miami

Sat 4/5

8:38 am-9:10 am

2 stops43h 32m

Southampton Eastleigh

Sat 4/12

4:25 pm-9:09 am

2 stops45h 44m

$1,076

MiamiSouthampton

MIA - SOU

MIASOU

Miami

Wed 6/4

11:15 am-8:45 am

2 stops16h 30m

Southampton Eastleigh

Thu 6/19

9:20 am-1:00 am

2 stops20h 40m

$1,111

MiamiSouthampton

MIA - SOU

MIASOU

Miami

Tue 7/8

9:40 am-12:00 pm

2 stops21h 20m

Southampton Eastleigh

Wed 7/16

9:10 am-9:40 am

2 stops29h 30m

$2,193

MiamiSouthampton

MIA - SOU

MIASOU

Miami

Thu 5/29

1:07 pm-6:55 pm

2 stops24h 48m

$484

MiamiSouthampton

MIA - SOU

MIASOU

Miami

Sun 4/20

7:00 am-8:45 am

2 stops20h 45m

$525

MiamiSouthampton

MIA - SOU

MIASOU

Miami

Fri 5/30

9:28 am-3:45 pm

2 stops25h 17m

$634

MiamiSouthampton

MIA - SOU

MIASOU

Miami

Tue 5/27

12:05 pm-8:45 am

2 stops15h 40m

$822

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/21

Best time to book a flight from Key Largo to Portsmouth

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

Travel insights for flights from Key Largo to Portsmouth

Get recent, data-driven insights about flights from Key Largo to Portsmouth including ideal travel times, pricing trends, and more.

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

Currently, November is the cheapest month in which you can book a flight from Key Largo to Portsmouth (average of $661). Flying from Key Largo to Portsmouth in June is currently the most expensive (average of $1,136). 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 KE9 to P0R?

Find hourly flight availability from Key Largo to Portsmouth. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 22, 2025.

When flying from Key Largo to Portsmouth, 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 Key Largo to Portsmouth?

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

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

Weekly flight availability from Key Largo to Portsmouth

Explore weekly flight availability from Key Largo to Portsmouth. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated February 22, 2025.

The most flights from KE9 to P0R are scheduled on a Wednesday (35 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (34 on average).

Rainfall in Portsmouth by month

Plan your trip to Portsmouth by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Portsmouth ranges from 1.0 - 3.0 inches per month. December is typically the wettest month, when rainfall can reach 3.0 in. July is typically the driest time to visit Portsmouth when rainfall is around 1.0 in.

Temperature in Portsmouth by month

Plan your trip to Portsmouth by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Portsmouth, 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 64.4 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 39.2 F).

Reviews of airlines servicing Portsmouth

Get insights into the airlines that provide service to Portsmouth. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Portsmouth. Reviews last updated February 22, 2025.
Delta
8.0
Very good
8,203 reviews

Crew

8.5

Food

7.3

Overall

8.0

Comfort

8.0

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta
8.0
Very good
8,203 reviews
Delta
8.0
Very good
8,203 reviews

Crew

8.5

Food

7.3

Overall

8.0

Comfort

8.0

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM
7.8
Good
1,330 reviews
Delta
8.0
Very good
8,203 reviews

Crew

8.5

Food

7.3

Overall

8.0

Comfort

8.0

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Aer Lingus
7.0
Good
1,070 reviews
Delta
8.0
Very good
8,203 reviews

Crew

8.5

Food

7.3

Overall

8.0

Comfort

8.0

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

British Airways
6.6
Okay
6,759 reviews
Delta
8.0
Very good
8,203 reviews

Crew

8.5

Food

7.3

Overall

8.0

Comfort

8.0

Boarding

8.2

Entertainment

7.9

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

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

  • What are the cheapest airlines to fly from Key Largo to Portsmouth one-way?

    The cheapest airline one-way is Delta, with whom users have recently found tickets for as low as $525. However, be on the lookout for offers from Aer Lingus and KLM, as they are both options that can get you from Key Largo to Portsmouth for a low price.

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

    No one likes to see their flight delayed. When booking a flight from Key Largo to Portsmouth consider choosing Singapore Airlines (69%), SriLankan Airlines (69%) or Gulf Air (69%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Key Largo to Portsmouth?

    While on average a flight from Key Largo to Portsmouth is generally $2,347, our data shows the cheapest flight currently is $338. When looking at the most popular route, (Miami - Southampton Eastleigh), you can expect to pay $853 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Key Largo to Portsmouth 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 Key Largo to Portsmouth?

    Currently, November is the cheapest month in which you can book a flight from Key Largo to Portsmouth (average of $661). Flying from Key Largo to Portsmouth in June is currently the most expensive (average of $1,136). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Key Largo to Portsmouth

See prices for flight routes from nearby airports that may be better suited for you.
Miami to Heathrow flights
Orlando to Heathrow flights
Tampa to Heathrow flights
Orlando to Gatwick flights
Tampa to Gatwick flights
Miami to London City flights
Miami to Gatwick flights
Orlando to London City flights
Tampa to London City flights
Fort Lauderdale to Heathrow flights
Orlando to Manchester flights
Miami to Stansted flights
Jacksonville to Heathrow flights
West Palm Beach to Heathrow flights
Orlando to Edinburgh flights
Fort Lauderdale to Gatwick flights
Orlando to Stansted flights
Jacksonville to Gatwick flights
Miami to Luton flights
Tampa to Edinburgh flights
West Palm Beach to Gatwick flights
Miami to Edinburgh flights
Pensacola to Heathrow flights
Jacksonville to London City flights
Fort Lauderdale to London City flights
Sarasota to Heathrow flights
Fort Myers to Heathrow flights
Miami to Manchester flights
Gainesville to Heathrow flights
Tampa to Manchester flights
Fort Lauderdale to Edinburgh flights
Orlando to Luton flights
Jacksonville to Edinburgh flights
Fort Myers to Gatwick flights
Melbourne to Heathrow flights
Pensacola to Edinburgh flights
Fort Myers to London City flights
Panama City to Heathrow flights
Orlando to Southampton flights
Daytona Beach to Heathrow flights
Tampa to Stansted flights
Fort Lauderdale to Stansted flights
Sarasota to Gatwick flights
Tallahassee to Heathrow flights
Tampa to Birmingham flights
West Palm Beach to London City flights
Pensacola to Gatwick flights
Tallahassee to Gatwick flights
Tampa to Luton flights
Miami to Southampton flights

Top 10 airlines flying from Key Largo to Portsmouth

Discover the top 10 airlines that operate flights from Key Largo to Portsmouth. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$203Average$614FlexibilityNo cancel feeOn-time77%
Norse Atlantic UKCheapest$287Average$532FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$369Average$658FlexibilityNo cancel feeOn-time67%
TAP AIR PORTUGALCheapest$452Average$734FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$455Average$720FlexibilityNo cancel feeOn-time72%
FinnairCheapest$455Average$745FlexibilityNo cancel feeOn-time76%
SWISSCheapest$468Average$563FlexibilityNo cancel feeOn-time79%
DeltaCheapest$486Average$887FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$513Average$744FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$517Average$767FlexibilityNo cancel feeOn-time70%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.