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Cheap flights from Portsmouth to Riverside from £364

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 10/1. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — LAX
14 Dec — 21 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Portsmouth to Riverside

Keep the following information in mind while searching for Portsmouth to Riverside flight deals. Data was last updated 14 November 2025.

Round-trip from

£465

One-way from

£364

Popular in

July

Cheapest in

February

Average price

£777
Virgin Atlantic
  • Virgin Atlantic
  • 26/3-30/3
  • 3 total stops
  • 69h 02m total
  • Portsmouth to Riverside
Search Deals
10/1
  • 10/1
  • 3 total stops
  • 53h 13m total
  • Portsmouth to Riverside
Search Deals
Highest demand for flights based on searches. 24% potential increase in price (£179 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£29 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Find 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 14 November 2025.

Sat 15/1109:25SOU - LAX
1 stop34h 20mDelta
Wed 3/1213:45LAX - SOU
1 stop19h 40mDelta
Deal found 12/11£505
Thu 13/1118:05SOU - LAX
1 stop25h 40mDelta
Mon 1/1213:45LAX - SOU
1 stop19h 15mDelta
Deal found 12/11£507
Sat 15/1109:25SOU - LAX
2 stops19h 19mDelta
Mon 1/1208:55LAX - SOU
2 stops24h 05mDelta
Deal found 12/11£510
Sun 16/1109:30SOU - LAX
1 stop34h 15mDelta
Wed 3/1213:45LAX - SOU
1 stop19h 40mDelta
Deal found 12/11£587
Thu 13/1118:05SOU - LAX
1 stop25h 40mDelta
Thu 4/1213:45LAX - SOU
1 stop19h 15mDelta
Deal found 12/11£587
Sun 16/1118:05SOU - LAX
1 stop25h 40mDelta
Thu 4/1213:45LAX - SOU
1 stop35h 05mDelta
Deal found 12/11£668
Tue 18/1117:30SOU - LAX
1 stop26h 15mDelta
Fri 28/1113:40LAX - SOU
1 stop19h 20mDelta
Deal found 12/11£840
Sat 15/1117:30SOU - LAX
1 stop26h 15mDelta
Sun 30/1113:45LAX - SOU
1 stop19h 40mDelta
Deal found 12/11£853
Thu 13/1118:05SOU - LAX
1 stop25h 40mDelta
Sun 30/1113:45LAX - SOU
1 stop19h 40mDelta
Deal found 12/11£853
Mon 1/1220:40SOU - LAX
2 stops24h 50mBritish Airways
Thu 11/1220:15LAX - SOU
1 stop15h 25mBritish Airways
Deal found 12/11£909
Wed 26/1112:25SOU - LAX
1 stop14h 05mBritish Airways
Wed 3/1215:30LAX - SOU
2 stops19h 55mBritish Airways
Deal found 12/11£926
Tue 23/1216:05SOU - LAX
2 stops29h 25mBritish Airways
Tue 6/115:30LAX - SOU
2 stops20h 30mBritish Airways
Deal found 13/11£929

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 14 November 2025.
Use the filters below to find and compare flights from Portsmouth to Riverside that are best for you.

Fly from

Portsmouth

Fly to

Riverside

Route

Depart

Return

Price

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Thu 26/3

18:05-00:07

2 stops37h 02m

Los Angeles

Mon 30/3

16:50-08:50

1 stop32h 00m

£465

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Mon 2/2

09:25-11:45

1 stop34h 20m

Los Angeles

Wed 11/2

23:55-08:25

2 stops24h 30m

£490

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Mon 2/2

09:25-11:45

1 stop34h 20m

Los Angeles

Tue 10/2

13:45-17:00

1 stop19h 15m

£490

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Wed 7/1

17:35-18:53

2 stops33h 18m

Los Angeles

Sat 31/1

13:45-17:15

1 stop19h 30m

£510

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Wed 7/1

17:35-18:53

2 stops33h 18m

Los Angeles

Sun 18/1

13:45-17:05

1 stop19h 20m

£511

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Thu 8/1

09:00-19:07

2 stops18h 07m

Los Angeles

Sun 1/2

08:30-08:50

2 stops16h 20m

£527

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Thu 26/3

18:05-19:35

2 stops32h 30m

Los Angeles

Mon 30/3

13:50-08:50

1 stop35h 00m

£530

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Wed 7/1

17:35-19:07

2 stops33h 32m

Los Angeles

Tue 27/1

11:35-17:00

2 stops21h 25m

£530

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Wed 7/1

17:35-19:07

2 stops33h 32m

Los Angeles

Wed 28/1

07:45-08:25

2 stops16h 40m

£530

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Sat 10/1

15:20-12:33

3 stops53h 13m

£364

Flights are sorted by cheapest return flights first.

Deals found on 13/11

Showing 1-10 of 17 results
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 month to book a flight from Portsmouth to Riverside?

Currently, September is the cheapest month in which you can book a flight from Portsmouth to Riverside (average of £243). Flying from Portsmouth to Riverside in July is currently the most expensive (average of £420). 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 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 14 November 2025.

It’s optimal to fly from Portsmouth to Riverside in the afternoon. By choosing this option you can save up to 19% on the cost of your flight, compared to a flight in the evening.

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

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

Travellers seeking maximum savings on their Portsmouth to Riverside flight should consider departing on Sunday mornings 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.

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 14 November 2025.

The most flights from P0R to R1V are scheduled on a Wednesday (50 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (42 on average).

Reviews of airlines servicing Riverside

Get insights into the airlines that provide service to Riverside. 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 Riverside. Reviews last updated 14 November 2025.
Check out reviews from past customers who have flown with Virgin Atlantic from Portsmouth to Riverside 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.
Virgin Atlantic
7.5
Good
673 reviews
Check prices

Crew

8.1

Comfort

7.3

Entertainment

7.5

Food

6.9

Overall

7.5

Boarding

7.7

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Virgin Atlantic
7.5
Good
673 reviews
Virgin Atlantic
7.5
Good
673 reviews
Check prices

Crew

8.1

Comfort

7.3

Entertainment

7.5

Food

6.9

Overall

7.5

Boarding

7.7

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!

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 34h 20m. Fly via Virgin Atlantic 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 KLM (87%), Air France (83%) and Delta (83%).

  • What are the cheapest flights from Portsmouth to Riverside?

    While on average a flight from Portsmouth to Riverside is generally £2,585, our data shows the cheapest flight currently is £350. When looking at the most popular route, (Southampton Eastleigh - Los Angeles), you can expect to pay £466 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.

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

    Currently, September is the cheapest month in which you can book a flight from Portsmouth to Riverside (average of £243). Flying from Portsmouth to Riverside in July is currently the most expensive (average of £420). 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

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Alternative routes for Portsmouth to Riverside

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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 14 November 2025.
AirlineCheapestAverageFlexibilityOn-time
FinnairCheapest£285Average£526FlexibilityNo cancel feeOn-time76%
Search Finnair flights
SWISSCheapest£298Average£468FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Norse Atlantic UKCheapest£300Average£533FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
Aer LingusCheapest£340Average£552FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
DeltaCheapest£343Average£602FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Scandinavian AirlinesCheapest£352Average£481FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Brussels AirlinesCheapest£361Average£490FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
British AirwaysCheapest£363Average£527FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air FranceCheapest£366Average£489FlexibilityNo cancel feeOn-time77%
Search Air France flights
United AirlinesCheapest£366Average£561FlexibilityNo cancel feeOn-time69%
Search United 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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