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Cheap flights from Southampton to Key Largo from £310

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 31/10. Fares are subject to change and may not be available on all flights or dates of travel.
SOU — MIA
18 Oct — 25 Oct1
1 adult
1 adult, Economy

Cheap flight deals from Southampton to Key Largo

Keep the following information in mind while searching for Southampton to Key Largo flight deals. Data was last updated 18 September 2025.

Round-trip from

£525

One-way from

£310

Popular in

December

Cheapest in

September

Average price

£399
31/10-7/11
  • 31/10-7/11
  • 4 total stops
  • 40h 55m total
  • Southampton to Key Largo
Search Deals
31/10
  • 31/10
  • 3 total stops
  • 59h 40m total
  • Southampton to Key Largo
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (£9 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from Southampton to Key Largo

Cheapest flights from Southampton to Key Largo
Explore the most affordable flight options available from Southampton to Key Largo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2025.

Fri 31/1020:10SOU - MIA
2 stops23h 40mMultiple Airlines
Fri 7/1116:35MIA - SOU
2 stops17h 15mMultiple Airlines
Deal found 16/9£525
Sat 1/1109:25SOU - MIA
2 stops17h 54mDelta
Sat 8/1108:11MIA - SOU
2 stops19h 39mDelta
Deal found 17/9£535
Tue 4/1115:20SOU - MIA
3 stops28h 30mMultiple Airlines
Thu 6/1108:00MIA - SOU
3 stops30h 20mMultiple Airlines
Deal found 17/9£594
Sat 1/1117:30SOU - MIA
1 stop26h 20mVirgin Atlantic
Sat 8/1107:05MIA - SOU
2 stops20h 45mVirgin Atlantic
Deal found 17/9£624
Fri 31/1009:30SOU - MIA
1 stop12h 40mAer Lingus
Fri 7/1119:05MIA - SOU
1 stop32h 40mAer Lingus
Deal found 16/9£624
Sat 1/1118:55SOU - MIA
2 stops24h 55mMultiple Airlines
Sat 8/1111:07MIA - SOU
3 stops25h 43mMultiple Airlines
Deal found 17/9£728

Cheapflights Fare Finder

 
Customise your flight search to find flights from Southampton to Key Largo 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 858,174 searches. Data last updated 18 September 2025.
Use the filters below to find and compare flights from Southampton to Key Largo that are best for you.

Fly from

Southampton

Fly to

Key Largo

Route

Depart

Return

Price

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Fri 31/10

20:10-15:50

2 stops23h 40m

Miami

Fri 7/11

16:35-14:50

2 stops17h 15m

£525

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Sat 1/11

09:25-23:19

2 stops17h 54m

Miami

Sat 8/11

08:11-08:50

2 stops19h 39m

£535

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Sat 7/3

09:25-14:50

1 stop34h 25m

Miami

Wed 11/3

14:03-17:25

2 stops23h 22m

£535

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Fri 6/3

17:30-18:55

2 stops30h 25m

Miami

Tue 10/3

15:35-17:00

2 stops21h 25m

£541

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Tue 4/11

15:20-14:50

3 stops28h 30m

Miami

Thu 6/11

08:00-19:20

3 stops30h 20m

£594

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Fri 6/3

09:30-18:00

1 stop13h 30m

Miami

Tue 10/3

23:00-20:00

2 stops17h 00m

£616

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Sat 1/11

17:30-15:50

1 stop26h 20m

Miami

Sat 8/11

07:05-08:50

2 stops20h 45m

£624

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Fri 31/10

09:30-18:10

1 stop12h 40m

Miami

Fri 7/11

19:05-08:45

1 stop32h 40m

£624

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Fri 31/10

08:10-15:50

3 stops59h 40m

£310

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Fri 31/10

09:30-18:10

1 stop12h 40m

£442

Flights are sorted by cheapest return flights first.

Deals found on 16/9

Showing 1-10 of 15 results
1
2

Best time to book a flight from Southampton to Key Largo

Have a flexible travel schedule? Discover the best time to fly to Key Largo from Southampton 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 Southampton to Key Largo

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

Currently, January is the cheapest month in which you can book a flight from Southampton to Key Largo (average of £559). Flying from Southampton to Key Largo in July is currently the most expensive (average of £760). 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.

Related info for your journey

Find useful and relevant information for your journey from Southampton to Key Largo. 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 from for flights from Southampton to Key Largo?

    Southampton Eastleigh (SOU), located 3.5 mi from the city center, is the airport you fly out of when you book flights from Southampton to Key Largo. 0 airlines have flights from Eastleigh to Key Largo on a regular basis. Booking flights from Southampton Eastleigh to Key Largo should not be difficult; the airport handles an average of 0 outbound flights to Key Largo per day.

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

    A quick flight from Southampton to Key Largo can take about 17h 54m. Delta provides one of the quickest options available for as low as £535. There are 4381 mi between Southampton and Key Largo. This flight may include one or multiple stops.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Southampton to Key Largo (average of £559). Flying from Southampton to Key Largo in July is currently the most expensive (average of £760). 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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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 Southampton to Key Largo?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Key Largo from Southampton today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Southampton to Key Largo?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Southampton to Key Largo for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Southampton to Key Largo with no change fees?

Yes, we can. To see specific flights from Southampton to Key Largo with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Southampton to Key Largo become cheaper?

Yes! Start tracking prices for Southampton 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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