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Cheap flights from Portsmouth to Japan from £396

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 15/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — FUK
27 Aug — 3 Sep1
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 28 July 2026.

Tue 8/909:05
SOU
-
KIX
2 stops27h 45m
Multiple Airlines
Tue 15/911:55
KIX
-
SOU
1 stop28h 50m
Multiple Airlines
Deal found 25/7£606
Tue 8/917:20
SOU
-
KIX
2 stops32h 20m
KLM
Tue 15/911:55
KIX
-
SOU
1 stop36h 55m
KLM
Deal found 27/7£615
Thu 17/917:20
SOU
-
NRT
2 stops35h 25m
Multiple Airlines
Wed 30/918:00
NRT
-
SOU
2 stops30h 50m
Multiple Airlines
Deal found 26/7£883
Thu 17/917:20
SOU
-
NRT
1 stop29h 50m
KLM
Wed 30/912:15
NRT
-
SOU
1 stop28h 20m
KLM
Deal found 27/7£991
Thu 17/909:05
SOU
-
HND
2 stops36h 50m
KLM
Wed 30/922:05
HND
-
SOU
2 stops26h 45m
KLM
Deal found 26/7£1,014
Wed 9/906:45
SOU
-
NRT
2 stops21h 45m
Multiple Airlines
Fri 18/910:40
NRT
-
SOU
3 stops30h 05m
Multiple Airlines
Deal found 24/7£1,163
Wed 9/917:20
SOU
-
HND
2 stops36h 40m
Multiple Airlines
Fri 18/915:40
HND
-
SOU
2 stops25h 05m
Multiple Airlines
Deal found 24/7£1,231
Mon 16/1109:20
SOU
-
HND
2 stops30h 40m
Multiple Airlines
Sun 29/1101:25
HND
-
SOU
2 stops24h 10m
Multiple Airlines
Deal found 28/7£1,232
Sat 1/809:15
SOU
-
HND
2 stops36h 40m
KLM
Mon 10/808:50
HND
-
SOU
2 stops31h 55m
KLM
Deal found 27/7£1,253
Thu 10/920:00
SOU
-
CTS
3 stops35h 20m
Multiple Airlines
Thu 17/910:30
CTS
-
SOU
3 stops41h 00m
Multiple Airlines
Deal found 27/7£1,342
Thu 17/917:20
SOU
-
HND
3 stops27h 40m
Multiple Airlines
Wed 30/916:20
HND
-
SOU
2 stops24h 15m
Multiple Airlines
Deal found 27/7£1,342
Sat 1/809:15
SOU
-
HND
3 stops28h 05m
Multiple Airlines
Sun 9/801:05
HND
-
SOU
3 stops47h 45m
Multiple Airlines
Deal found 27/7£1,379

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 28 July 2026.

Round-trip from

£606

One-way from

£396

Popular in

August

Cheapest in

January

Average price

£998
KLM
  • KLM
  • 8/9-15/9
  • 3 total stops
  • 56h 35m total
  • Portsmouth to Japan
Search Deals
15/9
  • 15/9
  • 3 total stops
  • 38h 30m total
  • Portsmouth to Japan
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£92 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£18 potential savings vs. average return price).
Search Deals
Average for round-trip flights in July 2026
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 28 July 2026.
Use the filters below to find and compare flights from Portsmouth to Japan that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SouthamptonOsaka

SOU - KIX

SOUKIX

Southampton Eastleigh

Tue 8/9

09:05-20:50

2 stops27h 45m

Osaka Kansai Intl

Tue 15/9

11:55-08:45

1 stop28h 50m

£606

SouthamptonTokyo

SOU - NRT

SOUNRT

Southampton Eastleigh

Thu 17/9

17:20-12:45

2 stops35h 25m

Tokyo Narita

Wed 30/9

18:00-16:50

2 stops30h 50m

£883

SouthamptonTokyo

SOU - HND

SOUHND

Southampton Eastleigh

Thu 17/9

09:05-05:55

2 stops36h 50m

Tokyo Haneda

Wed 30/9

22:05-16:50

2 stops26h 45m

£1,014

SouthamptonTokyo

SOU - NRT

SOUNRT

Southampton Eastleigh

Thu 17/9

17:20-07:10

1 stop29h 50m

Tokyo Narita

Wed 30/9

12:15-08:35

1 stop28h 20m

£1,022

SouthamptonTokyo

SOU - NRT

SOUNRT

Southampton Eastleigh

Wed 9/9

06:45-12:30

2 stops21h 45m

Tokyo Narita

Fri 18/9

10:40-08:45

3 stops30h 05m

£1,163

SouthamptonTokyo

SOU - HND

SOUHND

Southampton Eastleigh

Wed 9/9

17:20-14:00

2 stops36h 40m

Tokyo Haneda

Fri 18/9

15:40-08:45

2 stops25h 05m

£1,231

SouthamptonTokyo

SOU - HND

SOUHND

Southampton Eastleigh

Mon 16/11

09:20-01:00

2 stops30h 40m

Tokyo Haneda

Sun 29/11

01:25-16:35

2 stops24h 10m

£1,232

SouthamptonSapporo

SOU - CTS

SOUCTS

Southampton Eastleigh

Thu 10/9

20:00-15:20

3 stops35h 20m

Sapporo Chitose

Thu 17/9

10:30-19:30

3 stops41h 00m

£1,342

SouthamptonTokyo

SOU - NRT

SOUNRT

Southampton Eastleigh

Sat 31/10

09:20-17:55

2 stops47h 35m

Tokyo Narita

Fri 6/11

21:55-16:35

2 stops27h 40m

£1,402
Fastest return journey

SouthamptonTokyo

SOU - NRT

SOUNRT

Southampton Eastleigh

Wed 9/9

09:15-10:25

1 stop17h 10m

Tokyo Narita

Fri 18/9

12:15-08:45

1 stop28h 30m

£1,450

Flights are sorted by cheapest return flights first.

Deals found on 26/7

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

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 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 28 July 2026.

It’s optimal to fly from Portsmouth to Japan in the afternoon. By choosing this option you can save up to 17% 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 25 July 2026.

Travellers seeking maximum savings on their Portsmouth to Japan flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Saturday 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 28 July 2026.
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
7.8
Good
1,550 reviews
Check prices

Food

7.3

Entertainment

7.2

Overall

7.8

Comfort

7.7

Boarding

7.8

Crew

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
KLM
7.8
Good
1,550 reviews
KLM
7.8
Good
1,550 reviews
Check prices

Food

7.3

Entertainment

7.2

Overall

7.8

Comfort

7.7

Boarding

7.8

Crew

8.4

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

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?

    KLM can get you from Portsmouth to Japan in just under 36h 50m. Your travel time can differ by up to . There are 6007 mi between Portsmouth and Japan.

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

    When deciding which route to take from Portsmouth to Japan consider Southampton Eastleigh - Tokyo Narita, Southampton Eastleigh - Tokyo Haneda or Southampton Eastleigh - Osaka Kansai Intl 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.

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 28 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Shenzhen AirlinesCheapest£337Average£721FlexibilityNo cancel feeOn-time63%
Search Shenzhen Airlines flights
Korean AirCheapest£386Average£1,036FlexibilityNo cancel feeOn-time81%
Search Korean Air flights
China SouthernCheapest£388Average£589FlexibilityNo cancel feeOn-time69%
Search China Southern flights
Austrian AirlinesCheapest£405Average£697FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
KLMCheapest£548Average£882FlexibilityNo cancel feeOn-time75%
Search KLM flights
Asiana AirlinesCheapest£556Average£1,030FlexibilityNo cancel feeOn-time76%
Search Asiana Airlines flights
Etihad AirwaysCheapest£561Average£1,007FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
Air IndiaCheapest£572Average£703FlexibilityNo cancel feeOn-timeN/A
Search Air India flights
SWISSCheapest£683Average£861FlexibilityNo cancel feeOn-time79%
Search SWISS flights
ANACheapest£696Average£1,178FlexibilityNo cancel feeOn-time80%
Search ANA 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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