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Cheap flights from Portsmouth to Osaka from £375

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 1/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — OSA
8 Sep — 15 Sep1
1 adult

Cheap flight deals from Portsmouth to Osaka

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

Round-trip from

£982

One-way from

£375

Popular in

July

Cheapest in

November

Average price

£607
16/10-23/10
  • 16/10-23/10
  • 6 total stops
  • 69h 15m total
  • Portsmouth to Osaka
Search Deals
1/11
  • 1/11
  • 3 total stops
  • 59h 25m total
  • Portsmouth to Osaka
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£91 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£21 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2025
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Find flight deals from Portsmouth to Osaka

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

Thu 16/1019:50SOU - KIX
3 stops32h 40mMultiple Airlines
Thu 23/1015:00KIX - SOU
3 stops36h 35mMultiple Airlines
Deal found 2/9£982
Wed 29/1008:40SOU - KIX
2 stops45h 40mMultiple Airlines
Sat 1/1114:20KIX - SOU
2 stops50h 50mMultiple Airlines
Deal found 2/9£1,335
Thu 16/1017:35SOU - KIX
1 stop32h 45mKLM
Thu 23/1012:00KIX - SOU
1 stop28h 45mKLM
Deal found 2/9£1,525
Thu 6/1109:30SOU - KIX
2 stops21h 55mQatar Airways
Sat 22/1109:55KIX - SOU
3 stops42h 45mQatar Airways
Deal found 1/9£1,574

Cheapflights Fare Finder

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

Fly from

Portsmouth

Fly to

Osaka

Route

Depart

Return

Price

SouthamptonOsaka

SOU - KIX

SOUKIX

Southampton Eastleigh

Thu 16/10

19:50-12:30

3 stops32h 40m

Osaka Kansai Intl

Thu 23/10

15:00-19:35

3 stops36h 35m

£982

SouthamptonOsaka

SOU - KIX

SOUKIX

Southampton Eastleigh

Wed 29/10

08:40-15:20

2 stops45h 40m

Osaka Kansai Intl

Sat 1/11

14:20-08:10

2 stops50h 50m

£1,335

SouthamptonOsaka

SOU - KIX

SOUKIX

Southampton Eastleigh

Thu 16/10

17:35-10:20

1 stop32h 45m

Osaka Kansai Intl

Thu 23/10

12:00-08:45

1 stop28h 45m

£1,525

SouthamptonOsaka

SOU - KIX

SOUKIX

Southampton Eastleigh

Thu 6/11

09:30-16:25

2 stops21h 55m

Osaka Kansai Intl

Sat 22/11

09:55-19:40

3 stops42h 45m

£1,574

SouthamptonOsaka

SOU - KIX

SOUKIX

Southampton Eastleigh

Sat 1/11

13:55-10:20

3 stops59h 25m

£375

SouthamptonOsaka

SOU - KIX

SOUKIX

Southampton Eastleigh

Wed 29/10

12:25-12:10

3 stops38h 45m

£380

SouthamptonOsaka

SOU - KIX

SOUKIX

Southampton Eastleigh

Tue 28/10

20:10-12:10

3 stops55h 00m

£382

SouthamptonOsaka

SOU - KIX

SOUKIX

Southampton Eastleigh

Thu 30/10

20:10-16:45

3 stops35h 35m

£387

SouthamptonOsaka

SOU - KIX

SOUKIX

Southampton Eastleigh

Fri 31/10

20:10-11:00

3 stops53h 50m

£388

SouthamptonOsaka

SOU - KIX

SOUKIX

Southampton Eastleigh

Mon 27/10

19:55-12:10

2 stops31h 15m

£393

Flights are sorted by cheapest return flights first.

Deals found on 2/9

Showing 1-10 of 11 results
1
2

Best time to book a flight from Portsmouth to Osaka

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

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

Currently, November is the cheapest month in which you can book a flight from Portsmouth to Osaka (average of £660). Flying from Portsmouth to Osaka in July is currently the most expensive (average of £1,386). 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 OSA?

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Portsmouth to Osaka as you normally would.

Reviews of airlines servicing Osaka

Get insights into the airlines that provide service to Osaka. 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 Osaka. Reviews last updated 3 September 2025.
Check out reviews from past customers who have flown with KLM from Portsmouth to Osaka 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
1,382 reviews
Check prices

Food

7.3

Boarding

7.8

Crew

8.4

Overall

7.8

Comfort

7.7

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.
KLM
7.8
Good
1,382 reviews
KLM
7.8
Good
1,382 reviews
Check prices

Food

7.3

Boarding

7.8

Crew

8.4

Overall

7.8

Comfort

7.7

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Related info for your journey

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

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from Portsmouth to Osaka (average of £660). Flying from Portsmouth to Osaka in July is currently the most expensive (average of £1,386). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 10 airlines flying from Portsmouth to Osaka

Discover the top 10 airlines that operate flights from Portsmouth to Osaka. 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 September 2025.
AirlineCheapestAverageFlexibilityOn-time
China EasternCheapest£385Average£562FlexibilityNo cancel feeOn-time62%
Search China Eastern flights
China SouthernCheapest£420Average£568FlexibilityNo cancel feeOn-time69%
Search China Southern flights
Air ChinaCheapest£434Average£646FlexibilityNo cancel feeOn-time67%
Search Air China flights
Shenzhen AirlinesCheapest£437Average£534FlexibilityNo cancel feeOn-time63%
Search Shenzhen Airlines flights
Cathay PacificCheapest£671Average£820FlexibilityNo cancel feeOn-time72%
Search Cathay Pacific flights
FinnairCheapest£719Average£932FlexibilityNo cancel feeOn-time76%
Search Finnair flights
KLMCheapest£725Average£910FlexibilityNo cancel feeOn-time75%
Search KLM flights
Japan AirlinesCheapest£729Average£1,082FlexibilityNo cancel feeOn-time79%
Search Japan Airlines flights
Asiana AirlinesCheapest£733Average£856FlexibilityNo cancel feeOn-time76%
Search Asiana Airlines flights
Etihad AirwaysCheapest£740Average£782FlexibilityNo cancel feeOn-time75%
Search Etihad Airways 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 Osaka?

Cheapflights helps you search for flights from Portsmouth to Osaka 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 Osaka?

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

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

Cheapflights does show flights with no change fees to all users. To see these options for flights from Portsmouth to Osaka, users can toggle the no change fees filter when performing a flight search.

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

Yes, Cheapflights offers price alerts on Portsmouth to Osaka flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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