How long is the flight from Portsmouth to Riverside?

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

In terms of precipitation, rainfall in Riverside ranges from 0.0 - 87.0 inches per month. February is typically the wettest month, when rainfall can reach 87.0 mm. July is typically the driest time to visit Riverside when rainfall is around 0.0 mm.

If weather is an important factor for your trip to Riverside, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 14.0 C).

What are the cheapest flights from Portsmouth to Riverside?

While on average a flight from Portsmouth to Riverside is generally £2,640, our data shows the cheapest flight currently is £340. When looking at the most popular route, (Southampton Eastleigh - Los Angeles), you can expect to pay £464 for that flight.

What are the most reliable airlines from Portsmouth to Riverside?

The top 3 most reliable airlines when flying from Portsmouth to Riverside are SriLankan Airlines (97%), Air Canada (93%) and Austrian Airlines (93%).

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.

£462+ Flights from Portsmouth to Riverside

Cheap flight deals from Portsmouth to Riverside

Round-trip from	£462
Popular in	July
Cheapest in	February
Average price	£434

Virgin Atlantic
19/2-26/2
3 total stops
53h 05m total
Portsmouth to Riverside

Search Deals

Highest demand for flights based on searches. 31% potential increase in price (£220 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 7% potential price decrease (£34 potential savings vs. average return price).

Search Deals

Average for round-trip flights in January 2026

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 January 2026.

Thu 19/217:35SOU - LAX

1 stop26h 10mVirgin Atlantic

Thu 26/213:45LAX - SOU

1 stop19h 15mVirgin Atlantic

Deal found 4/1£462

Wed 18/217:35SOU - LAX

1 stop26h 10mVirgin Atlantic

Wed 25/208:22LAX - SOU

2 stops15h 58mVirgin Atlantic

Deal found 6/1£464

Wed 4/212:25SOU - LAX

1 stop14h 05mBritish Airways

Sun 8/220:15LAX - SOU

1 stop15h 25mBritish Airways

Deal found 5/1£465

Thu 19/209:00SOU - LAX

2 stops21h 57mDelta

Thu 26/211:55LAX - SOU

2 stops21h 05mDelta

Deal found 4/1£485

Wed 26/818:05SOU - LAX

1 stop28h 40mDelta

Wed 2/916:45LAX - SOU

1 stop31h 50mDelta

Deal found 6/1£499

Wed 19/818:05SOU - LAX

1 stop25h 45mDelta

Wed 2/913:50LAX - SOU

1 stop19h 00mDelta

Deal found 6/1£500

Sun 11/1009:10SOU - LAX

1 stop17h 15mBritish Airways

Tue 20/1020:10LAX - SOU

1 stop15h 20mBritish Airways

Deal found 7/1£502

Tue 18/809:15SOU - LAX

1 stop34h 35mDelta

Mon 31/806:00LAX - SOU

2 stops18h 35mDelta

Deal found 6/1£503

Best flights from Portsmouth to Riverside
Discover carefully curated flight deals from Portsmouth to Riverside that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 7 January 2026.

Thu 19/217:35SOU - LAX

1 stop26h 10mVirgin Atlantic

Thu 26/213:45LAX - SOU

1 stop19h 15mVirgin Atlantic

Deal found 4/1£462

Thu 22/109:30SOU - LAX

1 stop17h 00mBritish Airways

Thu 5/220:15LAX - SOU

1 stop15h 25mBritish Airways

Deal found 6/1£465

Thu 19/209:00SOU - LAX

2 stops21h 57mDelta

Thu 26/211:55LAX - SOU

2 stops21h 05mDelta

Deal found 4/1£485

Wed 4/212:25SOU - LAX

1 stop14h 05mBritish Airways

Sun 8/220:15LAX - SOU

1 stop15h 25mBritish Airways

Deal found 4/1£465

Mon 6/409:10SOU - LAX

1 stop17h 15mBritish Airways

Mon 27/420:10LAX - SOU

1 stop15h 20mBritish Airways

Deal found 5/1£516

Last-minute flights from Portsmouth to Riverside
Discover last-minute flight deals from Portsmouth to Riverside. Data last updated 7 January 2026 and is based on user searches.

Mon 2/209:30SOU - LAX

1 stop17h 00mBritish Airways

Mon 23/215:30LAX - SOU

2 stops20h 30mBritish Airways

Deal found 5/1£598

Wed 4/212:25SOU - LAX

1 stop14h 05mBritish Airways

Sun 8/220:15LAX - SOU

1 stop15h 25mBritish Airways

Deal found 5/1£465

Wed 18/217:35SOU - LAX

1 stop26h 10mVirgin Atlantic

Wed 25/208:22LAX - SOU

2 stops15h 58mVirgin Atlantic

Deal found 6/1£464

Thu 19/209:00SOU - LAX

1 stop34h 45mVirgin Atlantic

Thu 26/206:00LAX - SOU

2 stops18h 20mVirgin Atlantic

Deal found 4/1£462

Thu 19/209:00SOU - LAX

2 stops21h 57mDelta

Thu 26/211:55LAX - SOU

2 stops21h 05mDelta

Deal found 4/1£485

Fri 20/209:00SOU - LAX

2 stops19h 40mKLM

Fri 27/213:45LAX - SOU

1 stop19h 15mKLM

Deal found 6/1£602

One-way flights from Portsmouth to Riverside
Search for one-way flight options from Portsmouth to Riverside. Find affordable one-way fares based on user searches. Data last updated 7 January 2026.

Wed 4/212:25SOU - LAX

1 stop14h 05mBritish Airways

Deal found 6/1£693

Sat 7/209:25SOU - LAX

1 stop34h 20mDelta

Deal found 6/1£798

Mon 12/109:30SOU - LAX

1 stop17h 00mBritish Airways

Deal found 5/1£892

Wed 14/112:25SOU - LAX

1 stop14h 05mBritish Airways

Deal found 5/1£893

Tue 13/120:30SOU - LAX

2 stops30h 00mBritish Airways

Deal found 5/1£912

Sun 1/220:25SOU - LAX

2 stops30h 05mBritish Airways

Deal found 6/1£913

Tue 3/217:35SOU - LAX

1 stop26h 10mDelta

Deal found 6/1£918

Fri 16/116:35SOU - LAX

2 stops28h 55mBritish Airways

Deal found 5/1£920

Tue 20/117:35SOU - LAX

1 stop26h 10mDelta

Deal found 5/1£935

Tue 13/117:35SOU - LAX

1 stop26h 10mDelta

Deal found 5/1£1,126

Fly from

Fly to

Route

Depart

Return

Price

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Thu 19/2

17:35-11:45

1 stop26h 10m

Los Angeles

Thu 26/2

13:45-17:00

1 stop19h 15m

£462

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Thu 22/1

09:30-18:30

1 stop17h 00m

Los Angeles

Thu 5/2

20:15-19:40

1 stop15h 25m

£465

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Wed 4/2

12:25-18:30

1 stop14h 05m

Los Angeles

Sun 8/2

20:15-19:40

1 stop15h 25m

£465

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Thu 19/2

09:00-22:57

2 stops21h 57m

Los Angeles

Thu 26/2

11:55-17:00

2 stops21h 05m

£485

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Mon 6/4

09:10-18:25

1 stop17h 15m

Los Angeles

Mon 27/4

20:10-19:30

1 stop15h 20m

£516

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Thu 5/2

09:30-18:30

1 stop17h 00m

£693

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Fri 6/2

09:30-18:30

1 stop17h 00m

£693

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Wed 4/2

12:25-18:30

1 stop14h 05m

£693

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Sat 7/2

10:15-18:30

2 stops40h 15m

£713

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Sat 7/2

09:25-11:45

1 stop34h 20m

£798

Flights are sorted by cheapest return flights first.

Deals found on 6/1

Showing 1-10 of 14 results

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 £237). Flying from Portsmouth to Riverside in July is currently the most expensive (average of £395). 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?

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

The most flights from P0R to R1V are scheduled on a Monday (38 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (32 on average).

Related info for your journey

How long is the flight from Portsmouth to Riverside?
There are many flights that can get you from Portsmouth to Riverside in 17h. Fly via Virgin Atlantic or British Airways 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 SriLankan Airlines (97%), Air Canada (93%) and Austrian Airlines (93%).
What are the cheapest flights from Portsmouth to Riverside?
While on average a flight from Portsmouth to Riverside is generally £2,640, our data shows the cheapest flight currently is £340. 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 £237). Flying from Portsmouth to Riverside in July is currently the most expensive (average of £395). 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

Alternative routes for Portsmouth to Riverside

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Top 10 airlines flying from Portsmouth to Riverside

Airline	Cheapest	Average	Flexibility	On-time
Iberia	Cheapest£237	Average£493	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
SWISS	Cheapest£275	Average£444	FlexibilityNo cancel fee	On-time79%	Search SWISS flights
Finnair	Cheapest£277	Average£477	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Norse Atlantic UK	Cheapest£291	Average£514	FlexibilityNo cancel fee	On-timeN/A	Search Norse Atlantic UK flights
Aer Lingus	Cheapest£331	Average£494	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Delta	Cheapest£334	Average£534	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
Scandinavian Airlines	Cheapest£336	Average£449	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
Brussels Airlines	Cheapest£355	Average£472	FlexibilityNo cancel fee	On-timeN/A	Search Brussels Airlines flights
Air France	Cheapest£355	Average£484	FlexibilityNo cancel fee	On-time77%	Search Air France flights
KLM	Cheapest£355	Average£519	FlexibilityNo cancel fee	On-time75%	Search KLM flights

Fly with Cheapflights

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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Cheap flights from Portsmouth to Riverside from £462

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 19/2. Fares are subject to change and may not be available on all flights or dates of travel.

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 January 2026.

Round-trip from

Popular in

Cheapest in

Average price

Find flight deals from Portsmouth to Riverside

Cheapest flights from Portsmouth to RiversideExplore 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 January 2026.

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 January 2026.

Cheapflights Fare Finder

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

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.

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?

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 January 2026.

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 January 2026.

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?

What are the most reliable airlines from Portsmouth to Riverside?

What are the cheapest flights from Portsmouth to Riverside?

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

How can I find direct flights from Portsmouth to Riverside?

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

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

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 Riverside

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

Top 10 airlines flying from Portsmouth to Riverside

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?

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

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

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

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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 January 2026.