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Cheap flights from Portsmouth to Denver from £735

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 29/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — DEN
16 Sep — 23 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Portsmouth to Denver

Enter your travel dates to find the best prices.

Cheapest flights from Portsmouth to Denver
Explore the most affordable flight options available from Portsmouth to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 August 2026.

Tue 29/909:05 -
2 stops18h 10m
Tue 6/1016:15 -
2 stops17h 35m
Deal found 15/8£735
Wed 16/909:15 -
2 stops18h 58m
Tue 22/916:30 -
2 stops17h 20m
Deal found 17/8£747
Sun 27/917:20 -
2 stops29h 04m
Sun 4/1008:45 -
2 stops16h 50m
Deal found 12/8£782
Wed 16/908:55 -
1 stop16h 20m
Tue 22/908:18 -
2 stops16h 47m
Deal found 17/8£789
Sun 27/917:20 -
1 stop31h 55m
Sun 4/1008:18 -
2 stops28h 12m
Deal found 12/8£876
Wed 18/1106:50 -
2 stops39h 20m
Sun 22/1117:01 -
2 stops33h 44m
Deal found 13/8£961
Sat 22/820:00 -
1 stop29h 15m
Sat 29/806:56 -
2 stops18h 39m
Deal found 17/8£992
Sun 27/909:20 -
2 stops33h 00m
Sun 4/1016:40 -
3 stops32h 45m
Deal found 12/8£1,058

Find flight deals from Portsmouth to Denver

Keep the following information in mind while searching for Portsmouth to Denver flight deals. Data was last updated 17 August 2026.

Round-trip from

£735

Popular in

August

Cheapest in

February

Average price

£885
KLM
  • KLM
  • 29/9-6/10
  • 4 total stops
  • 35h 45m total
  • Portsmouth to Denver
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£68 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£15 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Portsmouth to Denver 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 17 August 2026.
Use the filters below to find and compare flights from Portsmouth to Denver that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

SouthamptonDenver

SOU Southampton Eastleigh - DEN Denver Intl

SOUDEN

Southampton Eastleigh

Tue 29/9

09:05-20:15

2 stops18h 10m

Denver Intl

Tue 6/10

16:15-16:50

2 stops17h 35m

£735

SouthamptonDenver

SOU Southampton Eastleigh - DEN Denver Intl

SOUDEN

Southampton Eastleigh

Wed 16/9

09:15-21:13

2 stops18h 58m

Denver Intl

Tue 22/9

16:30-16:50

2 stops17h 20m

£747

SouthamptonDenver

SOU Southampton Eastleigh - DEN Denver Intl

SOUDEN

Southampton Eastleigh

Sun 27/9

17:20-15:24

2 stops29h 04m

Denver Intl

Sun 4/10

08:45-08:35

2 stops16h 50m

£782

SouthamptonDenver

SOU Southampton Eastleigh - DEN Denver Intl

SOUDEN

Southampton Eastleigh

Wed 18/11

06:50-15:10

2 stops39h 20m

Denver Intl

Sun 22/11

17:01-09:45

2 stops33h 44m

£961

SouthamptonDenver

SOU Southampton Eastleigh - DEN Denver Intl

SOUDEN

Southampton Eastleigh

Fri 2/10

19:55-16:25

2 stops27h 30m

Denver Intl

Fri 9/10

18:35-14:30

2 stops36h 55m

£1,196

SouthamptonDenver

SOU Southampton Eastleigh - DEN Denver Intl

SOUDEN

Southampton Eastleigh

Wed 16/9

20:00-20:17

3 stops31h 17m

Denver Intl

Tue 22/9

11:35-19:00

3 stops24h 25m

£1,304

SouthamptonDenver

SOU Southampton Eastleigh - DEN Denver Intl

SOUDEN

Southampton Eastleigh

Tue 29/9

19:30-19:00

3 stops30h 30m

Denver Intl

Tue 6/10

11:35-16:50

3 stops22h 15m

£1,360

SouthamptonDenver

SOU Southampton Eastleigh - DEN Denver Intl

SOUDEN

Southampton Eastleigh

Sun 30/8

17:20-18:15

1 stop31h 55m

Denver Intl

Thu 3/9

18:40-09:45

2 stops32h 05m

£1,862

Flights are sorted by cheapest return flights first.

Deals found on 15/8

Sorted by cheapest first

Best time to book a flight from Portsmouth to Denver

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

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

Find hourly flight availability from Portsmouth to Denver. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 August 2026.

When flying from Portsmouth to Denver, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Portsmouth to Denver

Explore weekly flight availability from Portsmouth to Denver. 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 17 August 2026.

The most flights from P0R to DEN are scheduled on a Monday (16 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (16 on average).

Related info for your journey

Find useful and relevant information for your journey from Portsmouth to Denver. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Denver from Portsmouth?

    Most people fly into Denver Intl (DEN) if they book a flight to Denver from Portsmouth. On average, Denver Intl has 0 inbound flights from Portsmouth per day from 12 airlines. Denver Intl is conveniently located just 18.5 mi from Denver’s city center.

  • How long is the flight from Portsmouth to Denver?

    For as low as £735, KLM can have you in Denver from Portsmouth in 18h 10m. There are 4645 mi between Portsmouth and Denver. Both multi-stop and direct flights can be found to your destination and back.

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

    Consider American Airlines (79%), Austrian Airlines (79%) or Aer Lingus (79%) when booking your flight. These represent the most reliable airlines when flying from Portsmouth to Denver.

  • What are the cheapest flights from Portsmouth to Denver?

    Looking for the cheapest flight from Portsmouth to Denver? While on average our users pay £1,777, our data indicates the cheapest price to be £504. The most popular route (Southampton Eastleigh - Denver Intl), is priced around £735.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Portsmouth to Denver 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

Browse thousands of different options on Cheapflights for your next trip

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Top 10 airlines flying from Portsmouth to Denver

Discover the top 10 airlines that operate flights from Portsmouth to Denver. 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 17 August 2026.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest£108Average£766FlexibilityNo cancel feeOn-time77%
Search Iberia flights
Brussels AirlinesCheapest£340Average£739FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
IcelandairCheapest£376Average£552FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£405Average£695FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Austrian AirlinesCheapest£411Average£675FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
British AirwaysCheapest£431Average£671FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest£440Average£686FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
JetBlueCheapest£449Average£640FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
American AirlinesCheapest£464Average£681FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
LufthansaCheapest£466Average£732FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Portsmouth to Denver?

Cheapflights helps you search for flights from Portsmouth to Denver via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

Cheapflights helps you find that perfect flight to Denver 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 Denver with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Portsmouth to Denver flexibly with Cheapflights today.

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

Of course! You can now track prices for flights from Portsmouth to Denver and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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