HK$3,523+ Cheap flights to Portsmouth

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 2-10. Fares are subject to change and may not be available on all flights or dates of travel.
— LHR
15 Sep — 22 Sep1
1 adult
1 adult, Economy, 0 bags

Flights to Portsmouth in 2026

Enter your travel dates to find the best prices.

Cheapest flights to Portsmouth
Explore the most affordable flight options available to Portsmouth. Find the lowest fares based on data from user searches, with prices last updated on 16 August 2026.

Mon 12-1016:30 -
2 stops34h 00m
Mon 19-1019:20 -
3 stops37h 40m
Deal found 14-8HK$6,960
Sun 13-920:20 -
2 stops30h 10m
Sun 20-917:20 -
2 stops32h 40m
Deal found 13-8HK$6,968
Thu 27-809:20 -
2 stops30h 20m
Sun 30-820:00 -
2 stops28h 40m
Deal found 12-8HK$7,964
Sun 30-820:20 -
2 stops43h 20m
Wed 2-920:00 -
2 stops30h 00m
Deal found 15-8HK$8,058
Fri 28-820:20 -
2 stops43h 15m
Mon 31-820:00 -
2 stops30h 00m
Deal found 13-8HK$8,364
Mon 12-1022:20 -
2 stops25h 30m
Mon 19-1017:20 -
1 stop15h 05m
Deal found 14-8HK$8,984
Sun 13-922:20 -
1 stop17h 15m
Sun 20-917:20 -
2 stops41h 20m
Deal found 13-8HK$9,118

Find flight deals to Portsmouth

Find the latest flights to Portsmouth in 2026, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 70,647 searches and data was last updated on 16 August 2026.

Return from

HK$5,500

One-way from

HK$3,523

Popular in

September

Cheapest in

May

Average price

HK$6,999
SWISS
  • SWISS
  • 11-10-10-11
  • 4 total stops
  • 49h 05m total
  • Hong Kong to London
Search Deals
2-10
  • 2-10
  • 3 total stops
  • 46h 45m total
  • Hong Kong to Portsmouth
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (HK$327 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (HK$86 potential savings vs. average return price).
Search Deals
Average for return flights in August 2026
Search Deals

Cheapflights Fare Finder

 
Locate flights to Portsmouth that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 70,647 searches and data was last updated on 16 August 2026.
Use the filters below to find and compare flights to Portsmouth that are best for you.

Fly from

Route

Departure

Return

Price

Cheapest return flight

Hong KongSouthampton

HKG Hong Kong Intl - SOU Southampton Eastleigh

HKGSOU

Hong Kong Intl

Mon 12-10

16:30-19:30

2 stops34h 00m

Southampton Eastleigh

Mon 19-10

19:20-16:00

3 stops37h 40m

HK$6,960

Hong KongSouthampton

HKG Hong Kong Intl - SOU Southampton Eastleigh

HKGSOU

Hong Kong Intl

Thu 27-8

09:20-08:40

2 stops30h 20m

Southampton Eastleigh

Sun 30-8

20:00-07:40

2 stops28h 40m

HK$7,964

Hong KongSouthampton

HKG Hong Kong Intl - SOU Southampton Eastleigh

HKGSOU

Hong Kong Intl

Sat 29-8

20:20-08:40

2 stops43h 20m

Southampton Eastleigh

Tue 1-9

20:00-09:00

2 stops30h 00m

HK$8,364
Fastest return journey

Hong KongSouthampton

HKG Hong Kong Intl - SOU Southampton Eastleigh

HKGSOU

Hong Kong Intl

Mon 12-10

22:20-16:50

2 stops25h 30m

Southampton Eastleigh

Mon 19-10

17:20-15:25

1 stop15h 05m

HK$8,984

Hong KongSouthampton

HKG Hong Kong Intl - SOU Southampton Eastleigh

HKGSOU

Hong Kong Intl

Fri 28-8

20:10-17:00

2 stops27h 50m

Southampton Eastleigh

Mon 31-8

09:05-15:25

1 stop23h 20m

HK$9,816

Hong KongSouthampton

HKG Hong Kong Intl - SOU Southampton Eastleigh

HKGSOU

Hong Kong Intl

Sun 30-8

20:20-19:25

3 stops30h 05m

Southampton Eastleigh

Wed 2-9

17:20-09:00

2 stops32h 40m

HK$9,840

Hong KongSouthampton

HKG Hong Kong Intl - SOU Southampton Eastleigh

HKGSOU

Hong Kong Intl

Thu 12-11

18:05-19:30

2 stops33h 25m

Southampton Eastleigh

Mon 16-11

09:20-21:40

2 stops28h 20m

HK$10,044

Hong KongSouthampton

HKG Hong Kong Intl - SOU Southampton Eastleigh

HKGSOU

Hong Kong Intl

Thu 3-9

01:25-19:30

2 stops25h 05m

Southampton Eastleigh

Fri 18-9

20:00-21:55

2 stops42h 55m

HK$10,577
Cheapest one-way

Hong KongSouthampton

HKG Hong Kong Intl - SOU Southampton Eastleigh

HKGSOU

Hong Kong Intl

Fri 2-10

22:20-16:50

1 stop25h 30m

HK$4,841

Hong KongSouthampton

HKG Hong Kong Intl - SOU Southampton Eastleigh

HKGSOU

Hong Kong Intl

Fri 4-9

19:40-19:30

2 stops30h 50m

HK$5,956

Flights are sorted by cheapest return flights first.

Deals found on 15-8

Showing 1-10 of 16 resultsSorted by cheapest first
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Best time to book a flight to Portsmouth

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

How long is the flight to Portsmouth?

On average, a flight from Hong Kong to Portsmouth takes 30 hours 50 minutes. Flights to Portsmouth from other popular cities in Hong Kong will vary in length. Below are a few examples of popular routes and their flight times.

Weekly flight availability to Portsmouth

The most flights from Hong Kong to Portsmouth are scheduled on a Saturday (8 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (6 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 25.0 - 76.0 mm per month. December is typically the wettest month, when rainfall can reach 76.0 mm. July is typically the driest time to visit Portsmouth when rainfall is around 25.0 mm.

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 18.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 4.0 C).

FAQs about flying to Portsmouth

  • Can I find cheaper flights to Portsmouth if I am willing to have stopovers?

    Yes, flights with stopovers are often cheaper than direct flights. Keep an eye out for flight deals to Portsmouth on Cheapflights that require 1 or 2 stops for potential cost savings.

  • What is the best airline to fly to Portsmouth?

    Based on reviews from Cheapflights users, China Southern is rated the highest out of the airlines that fly to Portsmouth.

  • How much is a return flight to Portsmouth?

    A return flight to Portsmouth will typically cost around HK$1,185, however they can be found for as little as HK$1,115.

  • Does London Heathrow have rental cars?

    Yes. Those touching down at London Heathrow can take advantage of the car hire services offered upon their arrival.

  • Are there hotels close to London Heathrow?

    Yes. London Heathrow has hotels nearby for those requiring accommodations. Aerotel London Heathrow is the closest property to London Heathrow (0.0 km away from London Heathrow).

See more FAQs

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Fly with Cheapflights

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How does Cheapflights help users find flights to Portsmouth?

Cheapflights makes it easy to find Portsmouth flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets to Portsmouth?

Cheapflights simply makes it quick and affordable to book flights to Portsmouth by bringing together all flight options from hundreds of airlines and agencies online — and we put them in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights to Portsmouth with no change fees?

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

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Yes, and it’s super simple to set up Price Alerts. Click the bell icon next to the flight deals above and provide your email address. That’s it!

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