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Cheap flights from Portsmouth to Osaka from £681

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 3/2. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — OSA
29 Nov — 6 Dec1
1 adult
1 adult, Economy, 0 bags

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 30 October 2025.

Round-trip from

£882

One-way from

£681

Popular in

July

Cheapest in

November

Average price

£647
23/3-5/4
  • 23/3-5/4
  • 4 total stops
  • 54h 00m total
  • Portsmouth to Osaka
Search Deals
3/2
  • 3/2
  • 2 total stops
  • 34h 55m total
  • Portsmouth to Osaka
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£87 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 October 2025
Search Deals

Find flight deals from Portsmouth to Osaka

Enter your travel dates to find the best prices.

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 30 October 2025.

Mon 29/1209:30SOU - KIX
2 stops21h 55mMultiple Airlines
Fri 9/117:55KIX - SOU
2 stops28h 45mMultiple Airlines
Deal found 28/10£1,995
Mon 29/1209:30SOU - KIX
2 stops21h 55mQatar Airways
Fri 9/117:55KIX - SOU
2 stops54h 40mQatar Airways
Deal found 28/10£2,052
Mon 29/1209:30SOU - KIX
2 stops21h 55mQatar Airways
Sat 10/116:55KIX - SOU
3 stops35h 45mQatar Airways
Deal found 28/10£2,436

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 30 October 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

Mon 23/3

08:50-16:30

2 stops22h 40m

Osaka Kansai Intl

Sun 5/4

09:30-08:50

2 stops31h 20m

£882

SouthamptonOsaka

SOU - KIX

SOUKIX

Southampton Eastleigh

Mon 23/3

17:30-11:20

1 stop32h 50m

Osaka Kansai Intl

Sun 5/4

12:00-08:50

1 stop28h 50m

£1,177

SouthamptonOsaka

SOU - KIX

SOUKIX

Southampton Eastleigh

Mon 9/3

08:50-11:20

1 stop17h 30m

Osaka Kansai Intl

Wed 11/3

13:00-08:20

1 stop28h 20m

£1,207

SouthamptonOsaka

SOU - KIX

SOUKIX

Southampton Eastleigh

Mon 29/12

09:30-16:25

2 stops21h 55m

Osaka Kansai Intl

Fri 9/1

17:55-13:40

2 stops28h 45m

£1,995

SouthamptonOsaka

SOU - KIX

SOUKIX

Southampton Eastleigh

Mon 29/12

09:30-16:25

2 stops21h 55m

Osaka Kansai Intl

Fri 9/1

17:55-15:35

2 stops54h 40m

£2,052

SouthamptonOsaka

SOU - KIX

SOUKIX

Southampton Eastleigh

Tue 3/2

20:30-16:25

2 stops34h 55m

£681

SouthamptonOsaka

SOU - KIX

SOUKIX

Southampton Eastleigh

Thu 27/11

08:40-16:25

2 stops22h 45m

£833

Flights are sorted by cheapest return flights first.

Deals found on 28/10

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, March is the cheapest month in which you can book a flight from Portsmouth to Osaka (average of £312). Flying from Portsmouth to Osaka in July is currently the most expensive (average of £732). 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 30 October 2025.

A simple way to save on the total cost of your ticket is to fly from Portsmouth to Osaka in the afternoon. If you’re flexible enough to do this you can expect to save up to 14% on your trip compared to booking a flight in the morning.

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

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

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

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 30 October 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
7.7
Good
1,406 reviews
Check prices

Crew

8.4

Overall

7.7

Entertainment

7.1

Comfort

7.7

Food

7.3

Boarding

7.8

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
1,406 reviews
KLM
7.7
Good
1,406 reviews
Check prices

Crew

8.4

Overall

7.7

Entertainment

7.1

Comfort

7.7

Food

7.3

Boarding

7.8

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 Osaka. 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 Osaka?

    KLM can get you from Portsmouth to Osaka in just under 32h 50m. Your travel time can differ by up to . Airlines will cover a distance of 5970 mi.

  • 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, March is the cheapest month in which you can book a flight from Portsmouth to Osaka (average of £312). Flying from Portsmouth to Osaka in July is currently the most expensive (average of £732). 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 30 October 2025.
AirlineCheapestAverageFlexibilityOn-time
China EasternCheapest£399Average£612FlexibilityNo cancel feeOn-time62%
Search China Eastern flights
China SouthernCheapest£426Average£569FlexibilityNo cancel feeOn-time69%
Search China Southern flights
Shenzhen AirlinesCheapest£458Average£586FlexibilityNo cancel feeOn-time63%
Search Shenzhen Airlines flights
Air ChinaCheapest£470Average£672FlexibilityNo cancel feeOn-time67%
Search Air China flights
Cathay PacificCheapest£681Average£870FlexibilityNo cancel feeOn-time72%
Search Cathay Pacific flights
FinnairCheapest£730Average£1,039FlexibilityNo cancel feeOn-time76%
Search Finnair flights
KLMCheapest£736Average£955FlexibilityNo cancel feeOn-time75%
Search KLM flights
Asiana AirlinesCheapest£737Average£908FlexibilityNo cancel feeOn-time76%
Search Asiana Airlines flights
ANACheapest£743Average£988FlexibilityNo cancel feeOn-time80%
Search ANA flights
Etihad AirwaysCheapest£768Average£795FlexibilityNo 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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