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Cheap flights from Portsmouth to Japan from £424

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 1/1. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — FUK
2 Jan — 9 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Portsmouth to Japan

Enter your travel dates to find the best prices.

Cheapest flights from Portsmouth to Japan
Explore the most affordable flight options available from Portsmouth to Japan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 3 December 2025.

Sun 7/1209:30SOU - NRT
1 stop17h 15mKLM
Sun 14/1213:35NRT - SOU
1 stop36h 50mKLM
Deal found 2/12£927
Sun 7/1218:05SOU - NRT
3 stops34h 40mMultiple Airlines
Sun 14/1208:55NRT - SOU
3 stops43h 25mMultiple Airlines
Deal found 2/12£950
Sun 7/1218:05SOU - HND
3 stops33h 45mMultiple Airlines
Sun 14/1212:00HND - SOU
3 stops40h 20mMultiple Airlines
Deal found 2/12£1,023
Sun 7/1209:30SOU - NRT
1 stop17h 15mKLM
Thu 11/1213:35NRT - SOU
1 stop36h 25mKLM
Deal found 30/11£1,027
Sun 7/1218:05SOU - HND
2 stops40h 20mKLM
Sun 14/1222:55HND - SOU
2 stops42h 15mKLM
Deal found 2/12£1,064
Sun 7/1209:30SOU - HND
2 stops24h 55mKLM
Thu 11/1222:55HND - SOU
2 stops42h 55mKLM
Deal found 1/12£1,076
Thu 11/1220:10SOU - NRT
2 stops30h 45mQatar Airways
Wed 7/116:55NRT - SOU
2 stops55h 40mQatar Airways
Deal found 2/12£1,364
Mon 15/1220:10SOU - NRT
2 stops30h 45mQatar Airways
Wed 7/116:55NRT - SOU
2 stops59h 45mQatar Airways
Deal found 2/12£1,506
Thu 11/1220:10SOU - NRT
2 stops30h 45mQatar Airways
Thu 8/116:55NRT - SOU
2 stops35h 45mQatar Airways
Deal found 2/12£1,663
Thu 11/1220:10SOU - NRT
2 stops30h 45mQatar Airways
Sun 11/121:55NRT - SOU
2 stops30h 45mQatar Airways
Deal found 2/12£1,774
Fri 12/1220:10SOU - NRT
2 stops36h 45mQatar Airways
Wed 7/116:55NRT - SOU
2 stops55h 40mQatar Airways
Deal found 2/12£1,828
Fri 12/1220:10SOU - KIX
2 stops59h 15mQatar Airways
Thu 8/117:55KIX - SOU
2 stops34h 45mQatar Airways
Deal found 1/12£2,408

Find flight deals from Portsmouth to Japan

Keep the following information in mind while searching for Portsmouth to Japan flight deals. Data was last updated 3 December 2025.

Round-trip from

£535

One-way from

£424

Popular in

August

Cheapest in

November

Average price

£902
14/1-21/1
  • 14/1-21/1
  • 4 total stops
  • 68h 40m total
  • Portsmouth to Japan
Search Deals
1/1
  • 1/1
  • 3 total stops
  • 46h 05m total
  • Portsmouth to Japan
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£126 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£19 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Portsmouth to Japan 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 3 December 2025.
Use the filters below to find and compare flights from Portsmouth to Japan that are best for you.

Fly from

Portsmouth

Fly to

Japan

Route

Depart

Return

Price

SouthamptonOsaka

SOU - KIX

SOUKIX

Southampton Eastleigh

Thu 15/1

15:00-12:35

2 stops36h 35m

Osaka Kansai Intl

Thu 22/1

14:35-17:30

2 stops35h 55m

£699

SouthamptonOsaka

SOU - KIX

SOUKIX

Southampton Eastleigh

Wed 21/1

09:25-11:20

1 stop16h 55m

Osaka Kansai Intl

Sun 25/1

13:00-17:05

1 stop37h 05m

£877

SouthamptonTokyo

SOU - NRT

SOUNRT

Southampton Eastleigh

Mon 2/2

20:10-11:55

2 stops30h 45m

Tokyo Narita

Thu 12/2

16:55-19:40

2 stops35h 45m

£910

SouthamptonOsaka

SOU - KIX

SOUKIX

Southampton Eastleigh

Sun 11/1

17:45-11:20

1 stop32h 35m

Osaka Kansai Intl

Thu 15/1

13:00-17:05

1 stop37h 05m

£1,019

SouthamptonOsaka

SOU - KIX

SOUKIX

Southampton Eastleigh

Sat 31/1

09:30-16:25

2 stops45h 55m

Osaka Kansai Intl

Sun 22/2

17:55-15:35

2 stops30h 40m

£1,283

SouthamptonTokyo

SOU - HND

SOUHND

Southampton Eastleigh

Mon 2/2

09:30-01:00

2 stops30h 30m

Tokyo Haneda

Thu 12/2

23:30-16:05

2 stops25h 35m

£1,299

SouthamptonTokyo

SOU - NRT

SOUNRT

Southampton Eastleigh

Mon 15/12

20:10-11:55

2 stops30h 45m

Tokyo Narita

Wed 7/1

16:55-19:40

2 stops59h 45m

£1,506

SouthamptonTokyo

SOU - NRT

SOUNRT

Southampton Eastleigh

Fri 12/12

20:10-17:55

2 stops36h 45m

Tokyo Narita

Wed 7/1

16:55-15:35

2 stops55h 40m

£1,828

SouthamptonTokyo

SOU - NRT

SOUNRT

Southampton Eastleigh

Sun 14/12

09:05-17:55

2 stops23h 50m

Tokyo Narita

Thu 8/1

16:55-19:40

2 stops35h 45m

£1,840

SouthamptonTokyo

SOU - NRT

SOUNRT

Southampton Eastleigh

Mon 15/12

20:10-11:55

2 stops30h 45m

Tokyo Narita

Thu 8/1

16:55-19:40

2 stops35h 45m

£1,900

Flights are sorted by cheapest return flights first.

Deals found on 2/12

Showing 1-10 of 32 results
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Best time to book a flight from Portsmouth to Japan

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

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

Currently, March is the cheapest month in which you can book a flight from Portsmouth to Japan (average of £312). Flying from Portsmouth to Japan in July is currently the most expensive (average of £675). 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 P0R to JP?

Find hourly flight availability from Portsmouth to Japan. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 3 December 2025.

It’s optimal to fly from Portsmouth to Japan in the afternoon. By choosing this option you can save up to 22% on the cost of your flight, compared to a flight at midday.

What is the cheapest day to fly from Portsmouth to Japan?

Use this chart to determine the cheapest time to fly return from Portsmouth to Japan. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their Portsmouth to Japan flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Friday at midday flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Japan

Get insights into the airlines that provide service to Japan. 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 Japan. Reviews last updated 3 December 2025.
Check out reviews from past customers who have flown with KLM from Portsmouth to Japan to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.7
Good
1,426 reviews
Check prices

Boarding

7.8

Food

7.2

Entertainment

7.1

Overall

7.7

Comfort

7.6

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
KLM
7.7
Good
1,426 reviews
KLM
7.7
Good
1,426 reviews
Check prices

Boarding

7.8

Food

7.2

Entertainment

7.1

Overall

7.7

Comfort

7.6

Crew

8.4

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

Related info for your journey

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

  • How long is the flight from Portsmouth to Japan?

    Qatar Airways and KLM can get you from Portsmouth to Japan in just under 30h 45m. Your travel time can differ by up to 7h 15m. There are 6006 mi between Portsmouth and Japan. Both multi-stop and direct flights can be found to your destination and back.

  • What are the most popular routes from Portsmouth to Japan?

    When deciding which route to take from Portsmouth to Japan consider Southampton Eastleigh - Osaka Kansai Intl, Southampton Eastleigh - Tokyo Narita or Southampton Eastleigh - Tokyo Haneda as they are the most popular.

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

    Yes. In addition to deals on Portsmouth to Japan flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Portsmouth to Japan?

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

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

    Yes. Cheapflights offers flight deals from Portsmouth to Japan 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 Portsmouth to Japan?

    Currently, March is the cheapest month in which you can book a flight from Portsmouth to Japan (average of £312). Flying from Portsmouth to Japan in July is currently the most expensive (average of £675). 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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Alternative routes for Portsmouth to Japan

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Top 10 airlines flying from Portsmouth to Japan

Discover the top 10 airlines that operate flights from Portsmouth to Japan. 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 858,174 searches. Data last updated 3 December 2025.
AirlineCheapestAverageFlexibilityOn-time
China SouthernCheapest£375Average£546FlexibilityNo cancel feeOn-time69%
Search China Southern flights
Shenzhen AirlinesCheapest£427Average£659FlexibilityNo cancel feeOn-time63%
Search Shenzhen Airlines flights
FinnairCheapest£451Average£1,074FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Air IndiaCheapest£577Average£661FlexibilityNo cancel feeOn-timeN/A
Search Air India flights
Scandinavian AirlinesCheapest£658Average£1,024FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Etihad AirwaysCheapest£663Average£949FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
SWISSCheapest£689Average£898FlexibilityNo cancel feeOn-time79%
Search SWISS flights
KLMCheapest£696Average£944FlexibilityNo cancel feeOn-time75%
Search KLM flights
ANACheapest£702Average£1,017FlexibilityNo cancel feeOn-time80%
Search ANA flights
LufthansaCheapest£733Average£1,149FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

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 Portsmouth to Japan?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Portsmouth to Japan. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Portsmouth to Japan.

Can Cheapflights find flights from Portsmouth to Japan with no change fees?

Yes! Cheapflights helps users easily find flights from Portsmouth to Japan with no change fees.

Can Cheapflights notify me if prices for flights from Portsmouth to Japan become cheaper?

Of course! You can now track prices for flights from Portsmouth to Japan and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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