In terms of precipitation, rainfall in Osaka ranges from 40.0 - 200.0 inches per month. June is typically the wettest month, when rainfall can reach 200.0 mm. January is typically the driest time to visit Osaka when rainfall is around 40.0 mm.

If weather is an important factor for your trip to Osaka, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 29.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 6.0 C).

What is the cheapest time of day to fly from P0R to OSA?

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.

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.

£477+ Cheap Flights from Portsmouth to Osaka

Cheap flight deals from Portsmouth to Osaka

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

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 31 August 2026.

Thu 3/909:05 -

1 stop17h 10m

Wed 9/907:35 -

2 stops33h 00m

Deal found 30/8£605

Sun 11/1019:30 -

3 stops32h 10m

Sun 18/1011:45 -

3 stops39h 05m

Deal found 30/8£1,194

Find flight deals from Portsmouth to Osaka

Round-trip from	£1,194
One-way from	£477
Popular in	July
Cheapest in	January
Average price	£951

11/10-18/10
6 total stops
71h 15m total
Portsmouth to Osaka

Search Deals

8/10
3 total stops
32h 50m total
Portsmouth to Osaka

Search Deals

Highest demand for flights based on searches. 18% potential increase in price (£115 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 August 2026

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SouthamptonOsaka

SOU Southampton Eastleigh - KIX Osaka Kansai Intl

SOUKIX

Southampton Eastleigh

Sun 11/10

19:30-11:40

3 stops32h 10m

Osaka Kansai Intl

Sun 18/10

11:45-18:50

3 stops39h 05m

£1,194

SouthamptonOsaka

SOU Southampton Eastleigh - KIX Osaka Kansai Intl

SOUKIX

Southampton Eastleigh

Tue 15/12

09:20-16:25

2 stops46h 05m

Osaka Kansai Intl

Thu 31/12

17:55-11:55

2 stops27h 00m

£1,473

Fastest return journey

SouthamptonOsaka

SOU Southampton Eastleigh - KIX Osaka Kansai Intl

SOUKIX

Southampton Eastleigh

Sun 11/10

17:20-10:05

1 stop32h 45m

Osaka Kansai Intl

Sun 18/10

11:55-08:35

1 stop28h 40m

£1,598

SouthamptonOsaka

SOU Southampton Eastleigh - KIX Osaka Kansai Intl

SOUKIX

Southampton Eastleigh

Fri 18/12

20:00-16:25

2 stops35h 25m

Osaka Kansai Intl

Sun 3/1

17:55-19:30

2 stops34h 35m

£1,694

Cheapest one-way

SouthamptonOsaka

SOU Southampton Eastleigh - KIX Osaka Kansai Intl

SOUKIX

Southampton Eastleigh

Thu 8/10

19:55-12:45

3 stops32h 50m

£477

SouthamptonOsaka

SOU Southampton Eastleigh - KIX Osaka Kansai Intl

SOUKIX

Southampton Eastleigh

Wed 7/10

10:45-12:45

3 stops42h 00m

£502

SouthamptonOsaka

SOU Southampton Eastleigh - KIX Osaka Kansai Intl

SOUKIX

Southampton Eastleigh

Wed 7/10

17:20-10:05

1 stop32h 45m

£954

Fastest single journey

SouthamptonOsaka

SOU Southampton Eastleigh - KIX Osaka Kansai Intl

SOUKIX

Southampton Eastleigh

Thu 8/10

09:05-10:05

1 stop17h 00m

£954

Flights are sorted by cheapest return flights first.

Deals found on 31/8

Sorted by cheapest first

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.

SOU-KIX

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

P0R-OSA

SOU-KIX

No data available for this route at this time. Please check back soon.

Related info for your journey

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.

Browse thousands of different options on Cheapflights for your next trip

Alternative routes

Complete your trip

Direct flights to Japan

Flights by cabin class

Osaka flight routes

Other flight options

Popular flights

Top destinations

Alternative routes for Portsmouth to Osaka

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Newcastle upon Tyne to Osaka Itami flights

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Top 8 airlines flying from Portsmouth to Osaka

Airline	Cheapest	Average	Flexibility	On-time
China Eastern	Cheapest£379	Average£635	FlexibilityNo cancel fee	On-time62%	Search China Eastern flights
China Southern	Cheapest£426	Average£444	FlexibilityNo cancel fee	On-time69%	Search China Southern flights
Air China	Cheapest£451	Average£751	FlexibilityNo cancel fee	On-time67%	Search Air China flights
KLM	Cheapest£554	Average£688	FlexibilityNo cancel fee	On-time75%	Search KLM flights
Etihad Airways	Cheapest£628	Average£1,135	FlexibilityNo cancel fee	On-time75%	Search Etihad Airways flights
Cathay Pacific	Cheapest£732	Average£894	FlexibilityNo cancel fee	On-time72%	Search Cathay Pacific flights
Asiana Airlines	Cheapest£738	Average£880	FlexibilityNo cancel fee	On-time76%	Search Asiana Airlines flights
Emirates	Cheapest£977	Average£1,066	FlexibilityNo cancel fee	On-time75%	Search Emirates flights

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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?

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Cheap flights from Portsmouth to Osaka from £477

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 8/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Portsmouth to Osaka

Cheapest flights from Portsmouth to OsakaExplore 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 31 August 2026.

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 31 August 2026.

Best flights from Portsmouth to OsakaDiscover carefully curated flight deals from Portsmouth to Osaka that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 31 August 2026.

Discover carefully curated flight deals from Portsmouth to Osaka that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 31 August 2026.

Last-minute flights from Portsmouth to OsakaDiscover last-minute flight deals from Portsmouth to Osaka. Data last updated 31 August 2026 and is based on user searches.

Discover last-minute flight deals from Portsmouth to Osaka. Data last updated 31 August 2026 and is based on user searches.

One-way flights from Portsmouth to OsakaSearch for one-way flight options from Portsmouth to Osaka. Find affordable one-way fares based on user searches. Data last updated 31 August 2026.

Search for one-way flight options from Portsmouth to Osaka. Find affordable one-way fares based on user searches. Data last updated 31 August 2026.

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Best time to book a flight from Portsmouth to Osaka

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Cheapflights Insights

Related info for your journey

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

How can I find direct flights from Portsmouth to Osaka?

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

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.

Alternative routes for Portsmouth to Osaka

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Osaka by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to Japan

Book a non-stop flight to one of these other cities located in Japan.

Search flights from Portsmouth to Osaka by cabin class

Find flights from Portsmouth to Osaka, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Other flights to Osaka

Explore flights to Osaka departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 31 August 2026.

Portsmouth and Osaka flights

Browse other Portsmouth and Osaka flight options. Last updated on 31 August 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Portsmouth to Osaka flights

Consider these flights travelling from Portsmouth to Osaka.

Top 8 airlines flying from Portsmouth to Osaka

Fly with Cheapflights

How does Cheapflights help users find flights from Portsmouth to Osaka?

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

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

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

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Book with Flexibility

Travel Smart

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 31 August 2026.

Best flights from Portsmouth to Osaka
Discover carefully curated flight deals from Portsmouth to Osaka that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 31 August 2026.

Last-minute flights from Portsmouth to Osaka
Discover last-minute flight deals from Portsmouth to Osaka. Data last updated 31 August 2026 and is based on user searches.

One-way flights from Portsmouth to Osaka
Search for one-way flight options from Portsmouth to Osaka. Find affordable one-way fares based on user searches. Data last updated 31 August 2026.