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Cheap flights from Portsmouth to Riverside from £350

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 5/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — LAX
31 Jul — 7 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Portsmouth to Riverside

Enter your travel dates to find the best prices.

Cheapest flights from Portsmouth to Riverside
Explore the most affordable flight options available from Portsmouth to Riverside. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 July 2026.

Sun 11/1009:15
SOU
-
LAX
1 stop13h 30m
Delta
Tue 20/1006:00
LAX
-
SOU
2 stops18h 45m
Delta
Deal found 28/6£612
Sun 11/1009:20
SOU
-
LAX
2 stops34h 25m
Aer Lingus
Tue 20/1008:15
LAX
-
SOU
2 stops27h 15m
Aer Lingus
Deal found 28/6£684
Fri 4/909:20
SOU
-
LAX
1 stop17h 05m
British Airways
Mon 14/920:10
LAX
-
SOU
1 stop15h 20m
British Airways
Deal found 26/6£698
Mon 28/909:20
SOU
-
LAX
1 stop17h 05m
British Airways
Mon 19/1020:10
LAX
-
SOU
1 stop15h 20m
British Airways
Deal found 29/6£698
Tue 29/909:15
SOU
-
LAX
1 stop17h 10m
British Airways
Tue 20/1020:10
LAX
-
SOU
1 stop15h 20m
British Airways
Deal found 30/6£700
Wed 30/909:20
SOU
-
LAX
1 stop17h 05m
British Airways
Wed 21/1020:10
LAX
-
SOU
1 stop15h 20m
British Airways
Deal found 1/7£701
Sat 26/917:20
SOU
-
LAX
1 stop33h 05m
British Airways
Sat 17/1020:10
LAX
-
SOU
1 stop15h 20m
British Airways
Deal found 27/6£708
Tue 3/1120:00
SOU
-
LAX
1 stop30h 30m
British Airways
Tue 17/1115:30
LAX
-
SOU
2 stops18h 10m
British Airways
Deal found 28/6£720
Sat 31/1009:20
SOU
-
LAX
1 stop17h 10m
British Airways
Wed 4/1120:15
LAX
-
SOU
1 stop15h 15m
British Airways
Deal found 28/6£726

Find flight deals from Portsmouth to Riverside

Keep the following information in mind while searching for Portsmouth to Riverside flight deals. Data was last updated 1 July 2026.

Round-trip from

£612

One-way from

£350

Popular in

July

Cheapest in

January

Average price

£1,569
KLM
  • KLM
  • 11/10-20/10
  • 2 total stops
  • 48h 15m total
  • Portsmouth to Riverside
Search Deals
5/11
  • 5/11
  • 3 total stops
  • 39h 45m total
  • Portsmouth to Riverside
Search Deals
Highest demand for flights based on searches. 34% potential increase in price (£314 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 12% potential price decrease (£66 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 Riverside 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 1 July 2026.
Use the filters below to find and compare flights from Portsmouth to Riverside that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Sun 11/10

09:20-11:45

2 stops34h 25m

Los Angeles Los Angeles

Tue 20/10

08:15-19:30

2 stops27h 15m

£684
Fastest return journey

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Fri 4/9

09:20-18:25

1 stop17h 05m

Los Angeles Los Angeles

Sun 13/9

20:10-19:30

1 stop15h 20m

£698

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Sat 31/10

09:20-19:30

1 stop17h 10m

Los Angeles Los Angeles

Wed 4/11

20:15-19:30

1 stop15h 15m

£729

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Tue 14/7

09:15-08:00

2 stops30h 45m

Los Angeles Los Angeles

Fri 28/8

07:35-08:45

2 stops17h 10m

£735

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Fri 4/9

09:20-18:25

1 stop17h 05m

Los Angeles Los Angeles

Mon 14/9

15:50-17:45

2 stops17h 55m

£736

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Mon 28/9

06:45-18:20

2 stops19h 35m

Los Angeles Los Angeles

Mon 19/10

17:05-19:25

2 stops18h 20m

£752

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Tue 29/9

06:45-18:20

2 stops19h 35m

Los Angeles Los Angeles

Tue 20/10

17:05-19:25

2 stops18h 20m

£769

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Mon 28/12

18:20-13:30

2 stops27h 10m

Los Angeles Los Angeles

Mon 18/1

20:15-19:30

1 stop15h 15m

£781
Cheapest one-way

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Tue 25/8

09:15-18:25

1 stop17h 10m

£441

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Wed 26/8

14:25-18:25

2 stops36h 00m

£462

Flights are sorted by cheapest return flights first.

Deals found on 27/6

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

Best time to book a flight from Portsmouth to Riverside

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

What is the cheapest time of day to fly from P0R to R1V?

Find hourly flight availability from Portsmouth to Riverside. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 1 July 2026.

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

Weekly flight availability from Portsmouth to Riverside

Explore weekly flight availability from Portsmouth to Riverside. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 1 July 2026.

The most flights from P0R to R1V are scheduled on a Monday (53 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (45 on average).

Related info for your journey

Find useful and relevant information for your journey from Portsmouth to Riverside. 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 Riverside?

    There are many flights that can get you from Portsmouth to Riverside in 17h 05m. Fly via Aer Lingus, British Airways, or Delta to get the fastest option. The distance from Portsmouth to Riverside is about 5434 mi. This flight may include one or multiple stops.

  • What are the most reliable airlines from Portsmouth to Riverside?

    The top 3 most reliable airlines when flying from Portsmouth to Riverside are Malaysia Airlines (94%), Royal Jordanian (89%) and KLM (89%).

  • What are the cheapest flights from Portsmouth to Riverside?

    While on average a flight from Portsmouth to Riverside is generally £3,084, our data shows the cheapest flight currently is £319. When looking at the most popular route, (Southampton Eastleigh - Los Angeles Los Angeles), you can expect to pay £612 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Portsmouth to Riverside 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 Riverside

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Portsmouth to Riverside

Discover the top 10 airlines that operate flights from Portsmouth to Riverside. 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 1 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Norse Atlantic UKCheapest£250Average£509FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
SWISSCheapest£301Average£442FlexibilityNo cancel feeOn-time79%
Search SWISS flights
United AirlinesCheapest£308Average£490FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Scandinavian AirlinesCheapest£325Average£444FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Aer LingusCheapest£337Average£448FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
DeltaCheapest£341Average£557FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Virgin AtlanticCheapest£344Average£485FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Brussels AirlinesCheapest£351Average£485FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
TAP AIR PORTUGALCheapest£357Average£488FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Austrian AirlinesCheapest£357Average£496FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines 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 Riverside?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Portsmouth to Riverside. 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 Riverside?

Cheapflights helps you find that perfect flight to Riverside from Portsmouth by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Yes, we can. To see specific flights from Portsmouth to Riverside with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Riverside from Portsmouth today and book when prices fit your budget.

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