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Cheap flights from Portsmouth to Key Largo

LHR — MIA
22 Nov — 29 Nov1
1 adult
1 adult, Economy, 0 bags

Find flight deals from Portsmouth to Key Largo

Popular in

August

Cheapest in

January

Average price

£556
Highest demand for flights based on searches. 3% potential increase in price (£17 potential increase over avg. return price).
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Cheapest flight prices on average. 1% potential price decrease (£6 potential savings vs. average return price).
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Average for round-trip flights in October 2026
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Cheapflights Insights

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

What is the cheapest time of day to fly from P0R to KE9?

When flying from Portsmouth to Key Largo, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Related info for your journey

  • 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 Malaysia Airlines (85%), Gulf Air (85%) and KLM (79%).

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

    Looking at all options, your cheapest flight can be booked for £348. While the most popular route (Southampton Eastleigh - Miami) can be booked for £712 on average, our data indicates £2,057 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top 10 airlines flying from Portsmouth to Key Largo

AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£304Average£474FlexibilityNo cancel feeOn-time76%
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SWISSCheapest£360Average£494FlexibilityNo cancel feeOn-time79%
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United AirlinesCheapest£360Average£572FlexibilityNo cancel feeOn-time69%
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Air CanadaCheapest£370Average£535FlexibilityNo cancel feeOn-time67%
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Scandinavian AirlinesCheapest£373Average£475FlexibilityNo cancel feeOn-time77%
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TAP AIR PORTUGALCheapest£374Average£542FlexibilityNo cancel feeOn-timeN/A
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LufthansaCheapest£375Average£499FlexibilityNo cancel feeOn-time76%
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Virgin AtlanticCheapest£383Average£551FlexibilityNo cancel feeOn-time72%
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FinnairCheapest£387Average£606FlexibilityNo cancel feeOn-time76%
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British AirwaysCheapest£392Average£608FlexibilityNo cancel feeOn-time70%
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Fly with Cheapflights

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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