$1,375+ Cheap flights to Portsmouth

— LHR
17 Sep — 24 Sep1
1 adult
1 adult, Economy, 0 bags

Flights to Portsmouth in 2026

Enter your travel dates to find the best prices.

Cheapest flights to Portsmouth

Wed 14/1016:40 -
2 stops36h 50m
Tue 10/1120:00 -
2 stops47h 30m
Deal found 16/8$1,947
Thu 1/1020:50 -
2 stops53h 00m
Thu 8/1020:00 -
2 stops48h 35m
Deal found 17/8$2,338
Wed 30/915:40 -
2 stops34h 10m
Wed 7/1009:20 -
2 stops35h 15m
Deal found 15/8$2,390
Wed 14/1022:10 -
2 stops52h 40m
Tue 10/1108:40 -
3 stops35h 45m
Deal found 16/8$2,458
Tue 13/1021:45 -
2 stops31h 45m
Wed 18/1109:20 -
2 stops34h 30m
Deal found 15/8$2,493
Wed 14/1015:50 -
2 stops37h 40m
Sun 15/1109:20 -
2 stops34h 30m
Deal found 15/8$2,499
Fri 16/1015:50 -
2 stops37h 40m
Mon 16/1109:20 -
2 stops34h 30m
Deal found 15/8$2,542
Wed 14/1015:50 -
2 stops37h 40m
Fri 20/1120:00 -
2 stops47h 50m
Deal found 15/8$2,545
Sat 10/1015:50 -
2 stops37h 40m
Sat 21/1109:20 -
2 stops34h 30m
Deal found 15/8$2,585
Sat 10/1015:50 -
2 stops37h 40m
Fri 20/1120:00 -
2 stops47h 50m
Deal found 15/8$2,589
Thu 12/1115:50 -
2 stops38h 40m
Mon 16/1109:20 -
2 stops34h 30m
Deal found 13/8$2,597

Find flight deals to Portsmouth

Return from

$1,458

One-way from

$1,375

Popular in

December

Cheapest in

February

Average price

$1,831
China Eastern
  • China Eastern
  • 8/11-14/11
  • 3 total stops
  • 70h 55m total
  • Sydney to London
Search Deals
24/9
  • 24/9
  • 2 total stops
  • 31h 45m total
  • Sydney to Portsmouth
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($143 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($50 potential savings vs. average return price).
Search Deals
Average for return flights in August 2026
Search Deals

Cheapflights Fare Finder

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

Fly from

Route

Depart

Return

Price

Cheapest return flight

SydneySouthampton

SYD Sydney Kingsford Smith - SOU Southampton Eastleigh

SYDSOU

Sydney Kingsford Smith

Thu 1/10

20:50-16:50

2 stops53h 00m

Southampton Eastleigh

Thu 8/10

20:00-06:35

2 stops48h 35m

$2,338

SydneySouthampton

SYD Sydney Kingsford Smith - SOU Southampton Eastleigh

SYDSOU

Sydney Kingsford Smith

Wed 14/10

22:10-16:50

2 stops52h 40m

Southampton Eastleigh

Tue 10/11

08:40-07:25

3 stops35h 45m

$2,458
Fastest return journey

SydneySouthampton

SYD Sydney Kingsford Smith - SOU Southampton Eastleigh

SYDSOU

Sydney Kingsford Smith

Thu 15/10

15:50-19:30

2 stops37h 40m

Southampton Eastleigh

Thu 19/11

09:20-06:50

2 stops34h 30m

$2,499

SydneySouthampton

SYD Sydney Kingsford Smith - SOU Southampton Eastleigh

SYDSOU

Sydney Kingsford Smith

Thu 15/10

15:50-19:30

2 stops37h 40m

Southampton Eastleigh

Sun 15/11

09:20-06:50

2 stops34h 30m

$2,499

SydneySouthampton

SYD Sydney Kingsford Smith - SOU Southampton Eastleigh

SYDSOU

Sydney Kingsford Smith

Fri 16/10

15:50-19:30

2 stops37h 40m

Southampton Eastleigh

Tue 17/11

09:20-06:50

2 stops34h 30m

$2,542

SydneySouthampton

SYD Sydney Kingsford Smith - SOU Southampton Eastleigh

SYDSOU

Sydney Kingsford Smith

Thu 15/10

15:50-19:30

2 stops37h 40m

Southampton Eastleigh

Fri 20/11

20:00-06:50

2 stops47h 50m

$2,545

SydneySouthampton

SYD Sydney Kingsford Smith - SOU Southampton Eastleigh

SYDSOU

Sydney Kingsford Smith

Thu 12/11

15:50-19:30

2 stops38h 40m

Southampton Eastleigh

Mon 16/11

09:20-06:50

2 stops34h 30m

$2,597

SydneySouthampton

SYD Sydney Kingsford Smith - SOU Southampton Eastleigh

SYDSOU

Sydney Kingsford Smith

Sat 3/10

14:50-19:30

2 stops37h 40m

Southampton Eastleigh

Sun 25/10

20:00-06:50

2 stops47h 50m

$2,702

SydneySouthampton

SYD Sydney Kingsford Smith - SOU Southampton Eastleigh

SYDSOU

Sydney Kingsford Smith

Wed 30/9

14:50-19:30

2 stops37h 40m

Southampton Eastleigh

Sun 18/10

09:20-07:10

2 stops35h 50m

$2,882

SydneySouthampton

SYD Sydney Kingsford Smith - SOU Southampton Eastleigh

SYDSOU

Sydney Kingsford Smith

Tue 29/9

14:50-19:30

2 stops37h 40m

Southampton Eastleigh

Thu 22/10

09:20-07:10

2 stops35h 50m

$2,882

Flights are sorted by cheapest return flights first.

Deals found on 14/8

Showing 1-10 of 18 resultsSorted by cheapest first
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Best time to book a flight to Portsmouth

Have a flexible travel schedule? Discover the best time to fly to Portsmouth with our price prediction graph.
Estimated return price

Cheapflights Insights

Everything you need to know about your flight to Portsmouth

How long is the flight to Portsmouth?

On average, a flight from Sydney to Portsmouth takes 28 hours 55 minutes. Flights to Portsmouth from other popular cities in Australia will vary in length. Below are a few examples of popular routes and their flight times.

Weekly flight availability to Portsmouth

The most flights from Sydney to Portsmouth are scheduled on a Monday (3 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (2 on average).

Rainfall in Portsmouth by month

In terms of precipitation, rainfall in Portsmouth ranges from 25.0 - 76.0 mm per month. December is typically the wettest month, when rainfall can reach 76.0 mm. July is typically the driest time to visit Portsmouth when rainfall is around 25.0 mm.

Temperature in Portsmouth by month

If weather is an important factor for your trip to Portsmouth, 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 18.0 C. Travellers hoping to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 4.0 C).

FAQs about flying to Portsmouth

  • Can I find cheaper flights to Portsmouth if I am willing to have stopovers?

    Yes, flights with stopovers are often cheaper than direct flights. Keep an eye out for flight deals to Portsmouth on Cheapflights that require 1 or 2 stops for potential cost savings.

  • What is the best airline to fly to Portsmouth?

    Based on reviews from Cheapflights users, Virgin Australia is rated the highest out of the airlines that fly to Portsmouth.

  • How much is a return flight to Portsmouth?

    A return flight to Portsmouth will typically cost around $267, however they can be found for as little as $246.

  • Where does the fastest flight to Portsmouth depart from?

    For those looking to save time traveling to Portsmouth, Perth offers the quickest one-way flight (25 hours 50 minutes).

  • Does London Heathrow have car hire?

    Yes. Those touching down at London Heathrow can take advantage of the car hire services offered upon their arrival.

  • Are there hotels close to London Heathrow?

    Yes. London Heathrow has hotels nearby for those requiring accommodations. Aerotel London Heathrow is the closest property to London Heathrow (0.0 km away from London Heathrow).

See more FAQs

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Yes, Cheapflights has a feature called Price Alerts, which notifies users when flight prices change. Track prices for your flight to Portsmouth today and book when you’re ready!

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