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Cheap flights from Portsmouth to Denver from £470

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 14/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — DEN
23 Apr — 30 Apr1
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 24 March 2026.

Tue 5/509:05
SOU
-
DEN
2 stops17h 59m
KLM
Tue 12/510:27
DEN
-
SOU
2 stops15h 08m
KLM
Deal found 21/3£729
Tue 5/520:00
SOU
-
DEN
1 stop29h 15m
Aer Lingus
Tue 12/506:11
DEN
-
SOU
2 stops18h 54m
Aer Lingus
Deal found 21/3£789
Sun 23/817:30
SOU
-
DEN
2 stops28h 37m
Delta
Thu 3/906:30
DEN
-
SOU
2 stops19h 05m
Delta
Deal found 24/3£829
Thu 3/1208:55
SOU
-
DEN
2 stops37h 35m
British Airways
Mon 7/1217:25
DEN
-
SOU
2 stops32h 00m
British Airways
Deal found 19/3£855
Fri 21/809:15
SOU
-
DEN
2 stops39h 16m
Delta
Wed 2/923:59
DEN
-
SOU
2 stops25h 36m
Delta
Deal found 24/3£859
Mon 6/409:05
SOU
-
DEN
2 stops21h 27m
Delta
Thu 16/414:39
DEN
-
SOU
2 stops19h 11m
Delta
Deal found 22/3£867
Sun 5/409:15
SOU
-
DEN
2 stops35h 53m
Delta
Sun 19/423:55
DEN
-
SOU
2 stops25h 40m
Delta
Deal found 22/3£869
Sun 5/417:20
SOU
-
DEN
2 stops29h 40m
KLM
Wed 15/406:40
DEN
-
SOU
2 stops18h 55m
KLM
Deal found 22/3£873
Fri 21/809:15
SOU
-
DEN
2 stops39h 16m
Delta
Fri 4/912:20
DEN
-
SOU
2 stops21h 30m
Delta
Deal found 24/3£889
Sun 5/409:15
SOU
-
DEN
2 stops37h 45m
Delta
Wed 15/418:27
DEN
-
SOU
2 stops15h 23m
Delta
Deal found 22/3£897

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 24 March 2026.

Round-trip from

£729

One-way from

£470

Popular in

December

Cheapest in

September

Average price

£657
KLM
  • KLM
  • 5/5-12/5
  • 4 total stops
  • 33h 07m total
  • Portsmouth to Denver
Search Deals
British Airways
  • British Airways
  • 14/9
  • 1 total stop
  • 15h 55m total
  • Portsmouth to Denver
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£8 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 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 24 March 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

SouthamptonDenver

SOU - DEN

SOUDEN

Southampton Eastleigh

Tue 5/5

09:05-20:04

2 stops17h 59m

Denver Intl

Tue 12/5

10:27-08:35

2 stops15h 08m

£729

SouthamptonDenver

SOU - DEN

SOUDEN

Southampton Eastleigh

Tue 5/5

20:00-18:15

1 stop29h 15m

Denver Intl

Tue 12/5

06:11-08:05

2 stops18h 54m

£789

SouthamptonDenver

SOU - DEN

SOUDEN

Southampton Eastleigh

Thu 27/8

18:05-15:07

2 stops28h 02m

Denver Intl

Wed 2/9

23:59-08:35

2 stops25h 36m

£859

SouthamptonDenver

SOU - DEN

SOUDEN

Southampton Eastleigh

Sun 23/8

17:30-17:58

2 stops31h 28m

Denver Intl

Fri 4/9

12:20-16:50

2 stops21h 30m

£859

SouthamptonDenver

SOU - DEN

SOUDEN

Southampton Eastleigh

Tue 7/4

09:05-20:20

2 stops18h 15m

Denver Intl

Thu 16/4

18:01-16:50

2 stops15h 49m

£873

SouthamptonDenver

SOU - DEN

SOUDEN

Southampton Eastleigh

Sun 5/4

17:20-16:00

2 stops29h 40m

Denver Intl

Thu 16/4

05:45-08:35

2 stops19h 50m

£897

SouthamptonDenver

SOU - DEN

SOUDEN

Southampton Eastleigh

Sun 5/4

09:15-16:00

2 stops37h 45m

Denver Intl

Wed 15/4

18:27-16:50

2 stops15h 23m

£897

SouthamptonDenver

SOU - DEN

SOUDEN

Southampton Eastleigh

Mon 6/4

09:05-19:51

2 stops17h 46m

Denver Intl

Mon 13/4

23:55-08:35

2 stops25h 40m

£897

SouthamptonDenver

SOU - DEN

SOUDEN

Southampton Eastleigh

Wed 8/4

09:05-19:51

2 stops17h 46m

Denver Intl

Wed 15/4

18:01-16:50

2 stops15h 49m

£897

SouthamptonDenver

SOU - DEN

SOUDEN

Southampton Eastleigh

Mon 6/4

17:20-17:17

2 stops30h 57m

Denver Intl

Sat 18/4

10:19-16:50

2 stops23h 31m

£966

Flights are sorted by cheapest return flights first.

Deals found on 23/3

Showing 1-10 of 19 resultsSorted by cheapest first
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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 month to book a flight from Portsmouth to Denver?

Currently, February is the cheapest month in which you can book a flight from Portsmouth to Denver (average of £367). Flying from Portsmouth to Denver in July is currently the most expensive (average of £493). 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 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 24 March 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.

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 13 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 £729, KLM can have you in Denver from Portsmouth in 17h 59m. 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 (90%), Aer Lingus (90%) or Finnair (90%) 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 £1,909, our data indicates the cheapest price to be £447. The most popular route (Southampton Eastleigh - Denver Intl), is priced around £729.

  • 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.

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

    Currently, February is the cheapest month in which you can book a flight from Portsmouth to Denver (average of £367). Flying from Portsmouth to Denver in July is currently the most expensive (average of £493). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 24 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest£282Average£569FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
Brussels AirlinesCheapest£346Average£582FlexibilityNo cancel feeOn-timeN/A
Search Brussels Airlines flights
IcelandairCheapest£365Average£503FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£400Average£649FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
LufthansaCheapest£401Average£581FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Virgin AtlanticCheapest£423Average£595FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Austrian AirlinesCheapest£424Average£618FlexibilityNo cancel feeOn-time78%
Search Austrian Airlines flights
JetBlueCheapest£435Average£543FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
British AirwaysCheapest£435Average£592FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest£437Average£600FlexibilityNo 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 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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