How long is the flight from Portsmouth to Riverside?

There are many flights that can get you from Portsmouth to Riverside in 26h 15m. Fly via Delta to get the fastest option. The distance from Portsmouth to Riverside is about 5434 mi.

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 £2,608, our data shows the cheapest flight currently is £360. When looking at the most popular route, (Southampton Eastleigh - Los Angeles), you can expect to pay £501 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 Aeromexico (100%), KLM (85%) and Air France (85%).

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.

£445+ Flights from Portsmouth to Riverside

Cheap flight deals from Portsmouth to Riverside

Round-trip from	£488
One-way from	£445
Popular in	July
Cheapest in	February
Average price	£809

Delta
5/2-23/2
2 total stops
54h 00m total
Portsmouth to Riverside

Search Deals

British Airways
3/12
1 total stop
14h 05m total
Portsmouth to Riverside

Search Deals

Highest demand for flights based on searches. 24% potential increase in price (£174 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease (£28 potential savings vs. average return price).

Search Deals

Average for round-trip flights in October 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 10 Oktober 2025.

Mo 24/1118:05SOU - LAX

1 stop25h 40mVirgin Atlantic

Mo 1/1213:45LAX - SOU

1 stop19h 15mVirgin Atlantic

Deal found 10/10£498

Fr 31/1008:40SOU - LAX

2 stops18h 50mKLM

Sa 8/1108:50LAX - SOU

2 stops16h 00mKLM

Deal found 10/10£508

Di 11/1108:40SOU - LAX

1 stop35h 05mDelta

Mo 24/1113:45LAX - SOU

1 stop19h 15mDelta

Deal found 10/10£510

Sa 15/1109:25SOU - LAX

2 stops19h 12mDelta

Mo 24/1113:45LAX - SOU

1 stop19h 15mDelta

Deal found 10/10£514

Mo 24/1118:05SOU - LAX

1 stop25h 40mDelta

Mo 1/1210:20LAX - SOU

2 stops22h 40mDelta

Deal found 10/10£516

So 12/1018:25SOU - LAX

1 stop28h 25mDelta

Fr 13/306:00LAX - SOU

2 stops19h 50mDelta

Deal found 9/10£550

So 12/1018:25SOU - LAX

1 stop28h 25mDelta

So 8/314:45LAX - SOU

1 stop19h 15mDelta

Deal found 9/10£575

Di 11/1117:30SOU - LAX

1 stop26h 15mDelta

So 23/1113:45LAX - SOU

1 stop34h 25mDelta

Deal found 10/10£636

So 16/1109:30SOU - LAX

1 stop34h 15mDelta

So 23/1113:45LAX - SOU

1 stop34h 25mDelta

Deal found 10/10£642

So 12/1018:25SOU - LAX

2 stops31h 24mDelta

Di 10/321:50LAX - SOU

2 stops27h 30mDelta

Deal found 9/10£648

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 10 Oktober 2025.

Di 10/217:30SOU - LAX

1 stop26h 15mDelta

Mo 23/213:45LAX - SOU

1 stop34h 25mDelta

Deal found 9/10£488

Do 26/308:50SOU - LAX

1 stop34h 55mVirgin Atlantic

Mo 30/316:50LAX - SOU

1 stop32h 00mVirgin Atlantic

Deal found 8/10£493

Do 5/209:00SOU - LAX

1 stop34h 45mDelta

Sa 21/207:00LAX - SOU

2 stops17h 50mDelta

Deal found 9/10£488

Do 5/209:00SOU - LAX

1 stop34h 45mDelta

So 22/222:55LAX - SOU

2 stops25h 15mDelta

Deal found 9/10£488

Do 5/209:00SOU - LAX

1 stop34h 45mDelta

Mo 23/213:45LAX - SOU

1 stop19h 15mDelta

Deal found 9/10£488

Mi 11/209:25SOU - LAX

1 stop34h 20mDelta

Mo 23/211:00LAX - SOU

2 stops22h 00mDelta

Deal found 9/10£488

Di 10/217:30SOU - LAX

1 stop26h 15mDelta

Sa 21/208:25LAX - SOU

2 stops16h 25mDelta

Deal found 9/10£488

Sa 7/209:25SOU - LAX

2 stops21h 17mDelta

Sa 21/207:00LAX - SOU

2 stops17h 50mDelta

Deal found 9/10£492

Di 10/217:30SOU - LAX

1 stop26h 15mDelta

Mi 18/213:45LAX - SOU

1 stop19h 15mDelta

Deal found 9/10£493

Last-minute flights from Portsmouth to Riverside
Discover last-minute flight deals from Portsmouth to Riverside. Data last updated 10 Oktober 2025 and is based on user searches.

So 12/1018:25SOU - LAX

1 stop28h 25mDelta

Fr 13/306:00LAX - SOU

2 stops19h 50mDelta

Deal found 9/10£550

So 12/1018:25SOU - LAX

1 stop28h 25mDelta

So 8/310:25LAX - SOU

2 stops23h 35mDelta

Deal found 9/10£575

Fr 31/1008:40SOU - LAX

2 stops18h 50mKLM

Sa 8/1108:50LAX - SOU

2 stops16h 00mKLM

Deal found 10/10£508

Di 11/1108:40SOU - LAX

1 stop35h 05mDelta

Mo 24/1113:45LAX - SOU

1 stop19h 15mDelta

Deal found 10/10£510

Di 11/1117:30SOU - LAX

1 stop26h 15mDelta

So 23/1113:45LAX - SOU

1 stop34h 25mDelta

Deal found 10/10£636

Sa 15/1109:25SOU - LAX

2 stops19h 12mDelta

Di 18/1110:50LAX - SOU

2 stops22h 10mDelta

Deal found 10/10£514

So 16/1109:30SOU - LAX

1 stop34h 15mDelta

So 23/1113:45LAX - SOU

1 stop34h 25mDelta

Deal found 10/10£642

Mo 24/1118:05SOU - LAX

1 stop25h 40mVirgin Atlantic

Mo 1/1213:45LAX - SOU

1 stop19h 15mVirgin Atlantic

Deal found 10/10£498

Mo 24/1118:05SOU - LAX

1 stop25h 40mDelta

Mo 1/1210:20LAX - SOU

2 stops22h 40mDelta

Deal found 10/10£516

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 10 Oktober 2025.

Mi 3/1212:25SOU - LAX

1 stop14h 05mBritish Airways

Deal found 9/10£445

Fr 28/1109:30SOU - LAX

2 stops20h 07mAer Lingus

Deal found 10/10£487

Do 4/1209:30SOU - LAX

1 stop17h 00mBritish Airways

Deal found 9/10£487

Mo 5/120:50SOU - LAX

2 stops29h 40mBritish Airways

Deal found 10/10£564

So 4/118:25SOU - LAX

2 stops53h 25mBritish Airways

Deal found 10/10£612

So 26/1018:05SOU - LAX

2 stops32h 24mDelta

Deal found 8/10£623

Cheapflights Fare Finder

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

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Di 10/2

17:30-11:45

1 stop26h 15m

Los Angeles

Mo 23/2

13:45-08:10

1 stop34h 25m

£488

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Do 5/2

09:00-11:45

1 stop34h 45m

Los Angeles

Sa 21/2

07:00-08:50

2 stops17h 50m

£488

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Do 5/2

09:00-11:45

1 stop34h 45m

Los Angeles

So 22/2

22:55-08:10

2 stops25h 15m

£488

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Do 5/2

09:00-11:45

1 stop34h 45m

Los Angeles

Mo 23/2

13:45-17:00

1 stop19h 15m

£488

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Mi 11/2

09:25-11:45

1 stop34h 20m

Los Angeles

Mo 23/2

11:00-17:00

2 stops22h 00m

£488

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Di 10/2

17:30-11:45

1 stop26h 15m

Los Angeles

Sa 21/2

08:25-08:50

2 stops16h 25m

£488

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Sa 7/2

09:25-22:42

2 stops21h 17m

Los Angeles

Sa 21/2

07:00-08:50

2 stops17h 50m

£492

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Do 26/3

08:50-12:45

1 stop34h 55m

Los Angeles

Mo 30/3

16:50-08:50

1 stop32h 00m

£493

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Di 10/2

17:30-11:45

1 stop26h 15m

Los Angeles

Mi 18/2

13:45-17:00

1 stop19h 15m

£493

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Mi 3/12

12:25-18:30

1 stop14h 05m

£445

Flights are sorted by cheapest return flights first.

Deals found on 9/10

Showing 1-10 of 15 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 £240). Flying from Portsmouth to Riverside in July is currently the most expensive (average of £417). 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?

It’s optimal to fly from Portsmouth to Riverside in the afternoon. By choosing this option you can save up to 21% on the cost of your flight, compared to a flight in the evening.

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

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

The most flights from P0R to R1V are scheduled on a Wednesday (53 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (47 on average).

Reviews of airlines servicing Riverside

Check out reviews from past customers who have flown with British Airways 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.

British Airways

6.7

Okay

7,449 reviews

Check prices

Reviews

1 / 20

6.0

Good

Roxanne,Sept 2025

LHR - IAD

Food was mediocre. Couldn't use headphones because no information on how to use. Staff paid so much attention on a family with a baby . They got VIP treatment.

British Airways

6.7

Okay

7,449 reviews

British Airways

6.7

Okay

7,449 reviews

Check prices

Reviews

1 / 20

6.0

Good

Roxanne,Sept 2025

LHR - IAD

Food was mediocre. Couldn't use headphones because no information on how to use. Staff paid so much attention on a family with a baby . They got VIP treatment.

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 26h 15m. Fly via Delta to get the fastest option. The distance from Portsmouth to Riverside is about 5434 mi.
What are the most reliable airlines from Portsmouth to Riverside?
The top 3 most reliable airlines when flying from Portsmouth to Riverside are Aeromexico (100%), KLM (85%) and Air France (85%).
What are the cheapest flights from Portsmouth to Riverside?
While on average a flight from Portsmouth to Riverside is generally £2,608, our data shows the cheapest flight currently is £360. When looking at the most popular route, (Southampton Eastleigh - Los Angeles), you can expect to pay £501 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 £240). Flying from Portsmouth to Riverside in July is currently the most expensive (average of £417). 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
Finnair	Cheapest£282	Average£485	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
SWISS	Cheapest£294	Average£465	FlexibilityNo cancel fee	On-time79%	Search SWISS flights
Norse Atlantic UK	Cheapest£296	Average£533	FlexibilityNo cancel fee	On-timeN/A	Search Norse Atlantic UK flights
Aer Lingus	Cheapest£336	Average£548	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Delta	Cheapest£339	Average£574	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
Brussels Airlines	Cheapest£348	Average£477	FlexibilityNo cancel fee	On-timeN/A	Search Brussels Airlines flights
Scandinavian Airlines	Cheapest£349	Average£484	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
Austrian Airlines	Cheapest£361	Average£482	FlexibilityNo cancel fee	On-time78%	Search Austrian Airlines flights
Air France	Cheapest£361	Average£481	FlexibilityNo cancel fee	On-time77%	Search Air France flights
United Airlines	Cheapest£363	Average£563	FlexibilityNo cancel fee	On-time69%	Search United Airlines 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 £445

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 3/12. 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 10 Oktober 2025.

Round-trip from

One-way 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 10 Oktober 2025.

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 10 Oktober 2025.

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 10 Oktober 2025.

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 29 September 2024.

Weekly flight availability from Portsmouth to Riverside

Reviews of airlines servicing Riverside

Check out reviews from past customers who have flown with British Airways 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.

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 10 Oktober 2025.