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Cheap flights from Portsmouth to Riverside from £420

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 19/1. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — LAX
7 Dec — 14 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 7 November 2025.

Round-trip from

£462

One-way from

£420

Popular in

July

Cheapest in

February

Average price

£680
Virgin Atlantic
  • Virgin Atlantic
  • 26/3-30/3
  • 3 total stops
  • 67h 37m total
  • Portsmouth to Riverside
Search Deals
British Airways
  • British Airways
  • 19/1
  • 1 total stop
  • 17h 00m total
  • Portsmouth to Riverside
Search Deals
Highest demand for flights based on searches. 24% potential increase in price (£181 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£30 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 7 November 2025.

Tue 23/1217:30SOU - LAX
2 stops31h 05mDelta
Wed 7/106:00LAX - SOU
2 stops27h 05mDelta
Deal found 6/11£493
Mon 15/1218:05SOU - LAX
2 stops34h 33mDelta
Thu 8/111:35LAX - SOU
2 stops37h 10mDelta
Deal found 6/11£500
Tue 23/1217:30SOU - LAX
2 stops31h 05mDelta
Thu 8/106:20LAX - SOU
2 stops18h 05mDelta
Deal found 6/11£506
Mon 15/1208:40SOU - LAX
2 stops34h 26mDelta
Tue 6/123:55LAX - SOU
2 stops24h 30mDelta
Deal found 6/11£519
Tue 18/1117:30SOU - LAX
1 stop26h 15mVirgin Atlantic
Tue 23/1205:30LAX - SOU
2 stops18h 40mVirgin Atlantic
Deal found 5/11£528
Fri 21/1117:30SOU - LAX
1 stop26h 15mDelta
Fri 28/1113:40LAX - SOU
1 stop35h 10mDelta
Deal found 4/11£545
Mon 15/1218:05SOU - LAX
2 stops34h 10mDelta
Wed 7/113:45LAX - SOU
1 stop19h 20mDelta
Deal found 6/11£548
Tue 23/1217:30SOU - LAX
2 stops31h 05mDelta
Sun 4/116:50LAX - SOU
2 stops40h 15mDelta
Deal found 6/11£573
Fri 21/1117:30SOU - LAX
1 stop26h 15mDelta
Sat 29/1113:45LAX - SOU
1 stop34h 25mDelta
Deal found 4/11£621
Tue 16/1208:40SOU - LAX
2 stops20h 44mDelta
Thu 8/109:50LAX - SOU
2 stops38h 55mDelta
Deal found 6/11£626

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 7 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

18:05-22:42

2 stops35h 37m

Los Angeles

Mon 30/3

16:50-08:50

1 stop32h 00m

£462

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Wed 24/12

17:30-16:35

2 stops31h 05m

Los Angeles

Wed 7/1

23:55-08:25

2 stops24h 30m

£493

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Mon 15/12

18:05-20:38

2 stops34h 33m

Los Angeles

Thu 8/1

11:35-08:45

2 stops37h 10m

£500

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Wed 24/12

17:30-16:35

2 stops31h 05m

Los Angeles

Thu 8/1

06:20-08:25

2 stops18h 05m

£506

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Tue 23/12

17:30-16:35

2 stops31h 05m

Los Angeles

Thu 8/1

06:20-08:25

2 stops18h 05m

£506

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Mon 15/12

18:05-20:15

2 stops34h 10m

Los Angeles

Wed 7/1

23:55-17:05

2 stops33h 10m

£519

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Fri 21/11

17:30-16:05

2 stops30h 35m

Los Angeles

Fri 28/11

13:40-08:50

1 stop35h 10m

£550

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Mon 19/1

09:30-18:30

1 stop17h 00m

£420

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Wed 21/1

12:25-18:30

1 stop14h 05m

£420

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Sun 18/1

16:05-18:30

1 stop34h 25m

£425

Flights are sorted by cheapest return flights first.

Deals found on 6/11

Showing 1-10 of 15 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 £244). Flying from Portsmouth to Riverside in July is currently the most expensive (average of £425). 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 7 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 7 November 2025.

The most flights from P0R to R1V are scheduled on a Wednesday (51 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (48 on average).

How much does it cost for a return flight from Portsmouth to Riverside?

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 7 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
672 reviews
Check prices

Entertainment

7.5

Food

6.9

Boarding

7.7

Overall

7.5

Crew

8.1

Comfort

7.3

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
672 reviews
Virgin Atlantic
7.5
Good
672 reviews
Check prices

Entertainment

7.5

Food

6.9

Boarding

7.7

Overall

7.5

Crew

8.1

Comfort

7.3

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 31h 05m. 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 £2,598, our data shows the cheapest flight currently is £352. When looking at the most popular route, (Southampton Eastleigh - Los Angeles), you can expect to pay £464 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 £244). Flying from Portsmouth to Riverside in July is currently the most expensive (average of £425). 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 7 November 2025.
AirlineCheapestAverageFlexibilityOn-time
FinnairCheapest£286Average£529FlexibilityNo cancel feeOn-time76%
Search Finnair flights
SWISSCheapest£299Average£470FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Norse Atlantic UKCheapest£301Average£536FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
Aer LingusCheapest£342Average£554FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
DeltaCheapest£345Average£605FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Scandinavian AirlinesCheapest£354Average£483FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Brussels AirlinesCheapest£363Average£493FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
British AirwaysCheapest£365Average£529FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air FranceCheapest£368Average£491FlexibilityNo cancel feeOn-time77%
Search Air France flights
United AirlinesCheapest£368Average£564FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

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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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