$1,360+ Cheap flights to Portsmouth

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 21/1. Fares are subject to change and may not be available on all flights or dates of travel.
— LHR
14 Dec — 21 Dec1
1 adult
1 adult, Economy, 0 bags

Flights to Portsmouth in 2025

Find the latest flights to Portsmouth in 2025, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 647,157 searches and data was last updated on 14 November 2025.

Return from

$1,447

One-way from

$1,453

Popular in

December

Cheapest in

February

Average price

$1,683
China Eastern
  • China Eastern
  • 19/11-25/11
  • 3 total stops
  • 66h 25m total
  • Sydney to London
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Qatar Airways
  • Qatar Airways
  • 26/4
  • 2 total stops
  • 37h 40m total
  • Sydney to Portsmouth
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($263 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($63 potential savings vs. average return price).
Search Deals
Average for return flights in November 2025
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Find flight deals to Portsmouth

Enter your travel dates to find the best prices.

Cheapest flights to Portsmouth
Explore the most affordable flight options available to Portsmouth. Find the lowest fares based on data from user searches, with prices last updated on 14 November 2025.

Tue 18/1115:50SYD - SOU
2 stops31h 05mMultiple Airlines
Wed 3/1220:10SOU - SYD
2 stops47h 40mMultiple Airlines
Deal found 12/11$2,570
Sun 28/1210:45SYD - SOU
3 stops41h 40mMultiple Airlines
Sun 4/109:30SOU - SYD
3 stops33h 45mMultiple Airlines
Deal found 13/11$3,490
Sun 28/1210:20SYD - SOU
2 stops32h 50mKLM
Sun 4/118:05SOU - SYD
2 stops55h 10mKLM
Deal found 13/11$3,790
Sat 27/1213:35SYD - SOU
3 stops41h 05mMultiple Airlines
Sat 3/109:30SOU - SYD
3 stops33h 45mMultiple Airlines
Deal found 12/11$3,935
Sat 27/1215:55SYD - SOU
2 stops36h 30mKLM
Sat 3/117:30SOU - SYD
2 stops26h 05mKLM
Deal found 12/11$4,221
Fri 12/1215:50SYD - SOU
2 stops28h 10mMultiple Airlines
Mon 29/1220:10SOU - SYD
2 stops47h 40mMultiple Airlines
Deal found 13/11$4,735
Sun 14/1215:50SYD - SOU
2 stops31h 15mMultiple Airlines
Mon 29/1220:10SOU - SYD
2 stops47h 40mMultiple Airlines
Deal found 13/11$4,819
Fri 19/1215:50SYD - SOU
2 stops28h 10mMultiple Airlines
Tue 30/1216:05SOU - SYD
2 stops27h 45mMultiple Airlines
Deal found 13/11$5,367
Fri 19/1215:50SYD - SOU
2 stops28h 10mMultiple Airlines
Mon 29/1220:10SOU - SYD
2 stops47h 40mMultiple Airlines
Deal found 13/11$5,387
Thu 18/1215:50SYD - SOU
2 stops38h 50mQatar Airways
Mon 29/1220:10SOU - SYD
2 stops47h 40mQatar Airways
Deal found 13/11$5,622

Cheapflights Fare Finder

 
Locate flights to Portsmouth that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 647,157 searches and data was last updated on 14 November 2025.
Use the filters below to find and compare flights to Portsmouth that are best for you.

Fly from

Sydney

Route

Depart

Return

Price

SydneySouthampton

SYD - SOU

SYDSOU

Sydney Kingsford Smith

Wed 18/3

11:15-08:20

2 stops32h 05m

Southampton Eastleigh

Sun 22/3

09:30-07:30

3 stops35h 00m

$2,686

SydneySouthampton

SYD - SOU

SYDSOU

Sydney Kingsford Smith

Thu 12/3

06:35-17:00

3 stops45h 25m

Southampton Eastleigh

Mon 16/3

17:30-07:35

2 stops51h 05m

$2,739

SydneySouthampton

SYD - SOU

SYDSOU

Sydney Kingsford Smith

Sun 28/12

10:45-17:25

3 stops41h 40m

Southampton Eastleigh

Sun 4/1

09:30-06:15

3 stops33h 45m

$3,490

SydneySouthampton

SYD - SOU

SYDSOU

Sydney Kingsford Smith

Sat 27/12

13:35-19:40

3 stops41h 05m

Southampton Eastleigh

Sat 3/1

09:30-06:15

3 stops33h 45m

$3,935

SydneySouthampton

SYD - SOU

SYDSOU

Sydney Kingsford Smith

Sat 27/12

15:55-17:25

2 stops36h 30m

Southampton Eastleigh

Sat 3/1

17:30-06:35

2 stops26h 05m

$4,221

SydneySouthampton

SYD - SOU

SYDSOU

Sydney Kingsford Smith

Wed 21/1

15:50-19:40

2 stops38h 50m

$1,360

SydneySouthampton

SYD - SOU

SYDSOU

Sydney Kingsford Smith

Thu 22/1

15:50-15:35

2 stops34h 45m

$1,360

SydneySouthampton

SYD - SOU

SYDSOU

Sydney Kingsford Smith

Tue 20/1

21:40-15:35

2 stops52h 55m

$1,372

SydneySouthampton

SYD - SOU

SYDSOU

Sydney Kingsford Smith

Mon 27/4

14:50-19:30

2 stops37h 40m

$1,453

SydneySouthampton

SYD - SOU

SYDSOU

Sydney Kingsford Smith

Sun 26/4

14:50-19:30

2 stops37h 40m

$1,453

Flights are sorted by cheapest return flights first.

Deals found on 13/11

Showing 1-10 of 16 results
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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
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 to Portsmouth

How long is the flight to Portsmouth?

On average, a flight from Sydney to Portsmouth takes 31 hours 5 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.

When is the cheapest time to fly to Portsmouth?

Use this chart to determine the cheapest time to fly return from Sydney to Portsmouth. Price data was last updated on 16 December 2024.

Users looking for the lowest fares to Portsmouth should consider flying on Saturday evenings, when prices are typically cheapest. Budget-minded travellers will want to avoid Wednesday at midday, when prices are usually at their highest.

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 Monday, which is when the least amount of flights are scheduled (3 on average).

Rainfall in Portsmouth by month

Plan your trip to Portsmouth by taking into account the average rainfall totals 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

Plan your trip to Portsmouth by taking into account the average temperature totals 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, Beijing Capital Airlines 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 $815, however they can be found for as little as $197.

  • Where does the fastest flight to Portsmouth depart from?

    For those looking to save time traveling to Portsmouth, Melbourne offers the quickest one-way flight (27 hours 5 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 Airport Terminal 2-3 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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