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$506+ Cheap flights from Key Largo, FL to Southampton (SOU)

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 4/22. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — SOU
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
1 adult, Economy
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Cheap flight deals from Key Largo to Southampton

Cheapest flights from Key Largo to Southampton
Explore the most affordable flight options available from Key Largo to Southampton. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 15, 2025.

This KAYAK deal was found by Cheapflights users on 12/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/177:05 pmMIA - SOU
1 stop15h 30mAer Lingus
Tue 1/1312:25 pmSOU - MIA
1 stop34h 35mAer Lingus
Deal found 12/15$1,242
This KAYAK deal was found by Cheapflights users on 12/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/177:05 pmMIA - SOU
1 stop15h 30mAer Lingus
Sun 1/119:30 amSOU - MIA
1 stop13h 30mAer Lingus
Deal found 12/15$1,284
This KAYAK deal was found by Cheapflights users on 12/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/197:05 pmMIA - SOU
1 stop32h 40mAer Lingus
Tue 1/1312:25 pmSOU - MIA
1 stop34h 35mAer Lingus
Deal found 12/15$1,371
This KAYAK deal was found by Cheapflights users on 12/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/197:05 pmMIA - SOU
1 stop32h 40mAer Lingus
Sun 1/119:30 amSOU - MIA
1 stop13h 30mAer Lingus
Deal found 12/15$1,414
This KAYAK deal was found by Cheapflights users on 12/15. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/197:05 pmMIA - SOU
1 stop32h 40mAer Lingus
Fri 1/99:30 amSOU - MIA
1 stop13h 30mAer Lingus
Deal found 12/15$1,751
This Delta deal was found by Cheapflights users on 12/15. 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.
Thu 12/184:50 pmMIA - SOU
1 stop19h 10mDelta
Wed 1/75:35 pmSOU - MIA
1 stop26h 15mDelta
Deal found 12/15$1,752
This Delta deal was found by Cheapflights users on 12/15. 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.
Thu 12/184:50 pmMIA - SOU
1 stop19h 10mDelta
Mon 1/125:35 pmSOU - MIA
1 stop26h 15mDelta
Deal found 12/15$1,790
This Delta deal was found by Cheapflights users on 12/15. 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.
Mon 12/156:30 pmMIA - SOU
2 stops41h 30mDelta
Wed 1/75:35 pmSOU - MIA
2 stops32h 09mDelta
Deal found 12/15$1,834
This Delta deal was found by Cheapflights users on 12/15. 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.
Thu 12/184:50 pmMIA - SOU
1 stop19h 10mDelta
Sat 1/109:25 amSOU - MIA
1 stop34h 25mDelta
Deal found 12/15$1,840
This Delta deal was found by Cheapflights users on 12/15. 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.
Thu 12/188:10 amMIA - SOU
2 stops18h 55mDelta
Fri 1/95:35 pmSOU - MIA
2 stops33h 02mDelta
Deal found 12/15$1,854
This Delta deal was found by Cheapflights users on 12/15. 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.
Thu 12/188:10 amMIA - SOU
2 stops18h 55mDelta
Sun 1/115:45 pmSOU - MIA
2 stops45h 41mDelta
Deal found 12/15$1,869
This Delta deal was found by Cheapflights users on 12/15. 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.
Mon 12/156:30 pmMIA - SOU
2 stops41h 30mDelta
Mon 1/125:35 pmSOU - MIA
2 stops31h 11mDelta
Deal found 12/15$1,872

Find flight deals from Key Largo to Southampton

Keep the following information in mind while searching for Key Largo to Southampton flight deals. Data was last updated December 15, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$841
(KLM)

One-way from

$506
(Delta)

Popular in

December

Cheapest in

February

Average price

$927
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 Southampton Eastleigh
Search Deals
One-way flight from Key Largo to Southampton Eastleigh
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($92 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Key Largo to Southampton 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 December 15, 2025.
Use the filters below to find and compare flights from Key Largo to Southampton that are best for you.

Fly from

Key Largo

Fly to

Southampton

Route

Depart

Return

Price

MiamiSouthampton

MIA - SOU

MIASOU

Miami

Wed 1/28

11:39 am-8:25 am

2 stops15h 46m

Southampton Eastleigh

Wed 2/4

9:25 am-12:51 am

2 stops20h 26m

$851

MiamiSouthampton

MIA - SOU

MIASOU

Miami

Tue 5/5

11:15 am-8:35 am

2 stops16h 20m

Southampton Eastleigh

Wed 5/13

5:20 pm-2:45 pm

1 stop26h 25m

$856

MiamiSouthampton

MIA - SOU

MIASOU

Miami

Mon 5/4

7:00 am-4:50 pm

2 stops28h 50m

Southampton Eastleigh

Mon 5/11

5:20 pm-2:45 pm

1 stop26h 25m

$856

MiamiSouthampton

MIA - SOU

MIASOU

Miami

Mon 5/4

7:00 am-4:50 pm

2 stops28h 50m

Southampton Eastleigh

Wed 5/13

5:20 pm-2:45 pm

1 stop26h 25m

$856

MiamiSouthampton

MIA - SOU

MIASOU

Miami

Mon 5/4

7:00 am-4:50 pm

2 stops28h 50m

Southampton Eastleigh

Fri 5/15

9:05 am-11:13 pm

2 stops19h 08m

$866

MiamiSouthampton

MIA - SOU

MIASOU

Miami

Wed 5/6

11:35 am-8:35 am

2 stops16h 00m

Southampton Eastleigh

Fri 5/15

9:05 am-11:13 pm

2 stops19h 08m

$866

MiamiSouthampton

MIA - SOU

MIASOU

Miami

Wed 5/6

7:00 am-8:35 am

2 stops20h 35m

Southampton Eastleigh

Mon 5/11

5:20 pm-5:09 pm

2 stops28h 49m

$866

MiamiSouthampton

MIA - SOU

MIASOU

Miami

Wed 5/6

11:35 am-8:35 am

2 stops16h 00m

Southampton Eastleigh

Wed 5/13

5:20 pm-5:09 pm

2 stops28h 49m

$866

MiamiSouthampton

MIA - SOU

MIASOU

Miami

Wed 5/6

11:20 am-8:35 am

2 stops16h 15m

Southampton Eastleigh

Tue 5/12

9:05 am-8:57 pm

2 stops16h 52m

$866

MiamiSouthampton

MIA - SOU

MIASOU

Miami

Wed 5/6

7:00 am-8:35 am

2 stops20h 35m

Southampton Eastleigh

Thu 5/14

9:05 am-8:57 pm

2 stops16h 52m

$866

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/14

Showing 1-10 of 18 results
1
2

Best time to book a flight from Key Largo to Southampton

Have a flexible travel schedule? Discover the best time to fly to Southampton 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.

Cheapflights Insights

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

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

Currently, January is the cheapest month in which you can book a flight from Key Largo to Southampton (average of $286). Flying from Key Largo to Southampton in December is currently the most expensive (average of $590). 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 SOU?

Find hourly flight availability from Key Largo to Southampton. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 15, 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 26% on flights from Key Largo to Southampton by exploring options for tickets at noon.

Related info for your journey

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

  • What airport do you fly into for flights to Southampton from Key Largo?

    Southampton Eastleigh (SOU) is the airport you will fly into if you book a flight from Key Largo to Southampton. You should not have trouble finding flights to Eastleigh from Key Largo; the airport handles an average of 0 inbound flights from Key Largo per day. You should also have plenty of airline options to choose from since 0 airlines have flights to the Southampton airport from Key Largo. It is only a 3.5 mi journey from Eastleigh (SOU) to Southampton’s city center.

  • How long is the flight from Key Largo to Southampton?

    Departing from Key Largo to Southampton will take you 15h 46m. The distance between Key Largo and Southampton is about 4381 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Key Largo to Southampton (average of $286). Flying from Key Largo to Southampton in December is currently the most expensive (average of $590). 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

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