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C$ 366+ 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 15/9. Fares are subject to change and may not be available on all flights or dates of travel.
— LHR
24 Jun — 1 Jul1
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
Explore the most affordable flight options available to Portsmouth. Find the lowest fares based on data from user searches, with prices last updated on 25 May 2026.

Mon 13/711:55 p.m.
YYZ
-
SOU
1 stop14h 35m
Multiple Airlines
Mon 20/75:20 p.m.
SOU
-
YYZ
1 stop27h 30m
Multiple Airlines
Deal found 23/5C$ 937
Tue 21/79:55 p.m.
YYZ
-
SOU
1 stop9h 05m
Multiple Airlines
Tue 28/78:00 p.m.
SOU
-
YYZ
2 stops33h 25m
Multiple Airlines
Deal found 24/5C$ 941
Fri 12/64:45 p.m.
YYZ
-
SOU
1 stop11h 00m
Delta
Tue 16/65:20 p.m.
SOU
-
YYZ
1 stop25h 00m
Delta
Deal found 21/5C$ 957
Sun 31/59:55 p.m.
YYZ
-
SOU
1 stop29h 40m
Delta
Sun 7/69:15 a.m.
SOU
-
YYZ
1 stop15h 40m
Delta
Deal found 20/5C$ 959
Mon 1/69:55 p.m.
YYZ
-
SOU
1 stop13h 55m
Delta
Sat 6/69:15 a.m.
SOU
-
YYZ
1 stop33h 05m
Delta
Deal found 22/5C$ 988
Tue 2/64:45 p.m.
YYZ
-
SOU
1 stop10h 50m
Delta
Wed 10/69:05 a.m.
SOU
-
YYZ
2 stops28h 50m
Delta
Deal found 20/5C$ 998
Thu 4/69:55 p.m.
YYZ
-
SOU
1 stop29h 50m
Delta
Mon 8/65:20 p.m.
SOU
-
YYZ
2 stops26h 59m
Delta
Deal found 22/5C$ 1,027
Mon 1/66:10 a.m.
YYZ
-
SOU
2 stops21h 25m
Delta
Sun 7/69:15 a.m.
SOU
-
YYZ
1 stop15h 40m
Delta
Deal found 22/5C$ 1,028
Mon 13/77:00 a.m.
YTZ
-
SOU
2 stops28h 50m
Multiple Airlines
Mon 20/712:20 p.m.
SOU
-
YTZ
3 stops32h 31m
Multiple Airlines
Deal found 23/5C$ 1,235

Find flight deals to Portsmouth

Find the latest flights to Portsmouth in 2026, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 629,999 searches and data was last updated on 25 May 2026.

Round-trip from

C$ 804

One-way from

C$ 366

Popular in

December

Cheapest in

February

Average price

C$ 850
Air Transat
  • Air Transat
  • 2/6-6/6
  • 2 total stops
  • 23h 40m total
  • Toronto to London
Search Deals
15/9
  • 15/9
  • 1 total stop
  • 10h 00m total
  • Toronto to Portsmouth
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (C$ 16 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

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 629,999 searches and data was last updated on 25 May 2026.
Use the filters below to find and compare flights to Portsmouth that are best for you.

Fly from

Route

Depart

Return

Price

Cheapest round-trip

TorontoSouthampton

YYZ - SOU

YYZSOU

Toronto Pearson Intl

Thu 4/6

9:55 p.m.-8:45 a.m.

1 stop29h 50m

Southampton Eastleigh

Mon 22/6

5:20 p.m.-1:20 p.m.

1 stop25h 00m

C$ 959

TorontoSouthampton

YYZ - SOU

YYZSOU

Toronto Pearson Intl

Fri 12/6

4:45 p.m.-8:45 a.m.

1 stop11h 00m

Southampton Eastleigh

Tue 16/6

5:20 p.m.-1:20 p.m.

1 stop25h 00m

C$ 986

TorontoSouthampton

YYZ - SOU

YYZSOU

Toronto Pearson Intl

Mon 7/9

9:55 p.m.-8:45 a.m.

1 stop29h 50m

Southampton Eastleigh

Sat 19/9

9:15 a.m.-11:24 p.m.

2 stops19h 09m

C$ 1,031

TorontoSouthampton

YYZ - SOU

YYZSOU

Toronto Pearson Intl

Thu 4/6

6:37 p.m.-8:45 a.m.

2 stops33h 08m

Southampton Eastleigh

Wed 10/6

9:05 a.m.-8:55 a.m.

2 stops28h 50m

C$ 1,060

TorontoSouthampton

YYZ - SOU

YYZSOU

Toronto Pearson Intl

Fri 5/6

6:00 a.m.-4:50 p.m.

2 stops29h 50m

Southampton Eastleigh

Tue 9/6

9:05 a.m.-7:55 p.m.

1 stop15h 50m

C$ 1,122

TorontoSouthampton

YYZ - SOU

YYZSOU

Toronto Pearson Intl

Fri 5/6

6:00 a.m.-4:50 p.m.

2 stops29h 50m

Southampton Eastleigh

Fri 19/6

5:20 p.m.-11:15 p.m.

2 stops34h 55m

C$ 1,140

TorontoSouthampton

YYZ - SOU

YYZSOU

Toronto Pearson Intl

Mon 31/8

4:45 p.m.-8:35 a.m.

1 stop10h 50m

Southampton Eastleigh

Thu 3/9

5:20 p.m.-7:55 p.m.

1 stop31h 35m

C$ 1,198
Quickest round-trip

TorontoSouthampton

YYZ - SOU

YYZSOU

Toronto Pearson Intl

Tue 11/8

4:45 p.m.-8:45 a.m.

1 stop11h 00m

Southampton Eastleigh

Wed 19/8

6:05 p.m.-1:20 p.m.

1 stop24h 15m

C$ 1,199

TorontoSouthampton

YTZ - SOU

YTZSOU

Toronto Island

Mon 13/7

7:00 a.m.-4:50 p.m.

2 stops28h 50m

Southampton Eastleigh

Mon 20/7

12:20 p.m.-3:51 p.m.

3 stops32h 31m

C$ 1,235
Cheapest one-way

TorontoSouthampton

YYZ - SOU

YYZSOU

Toronto Pearson Intl

Tue 15/9

9:55 p.m.-7:30 p.m.

2 stops40h 35m

C$ 373

Flights are sorted by cheapest round-trip flights first.

Deals found on 21/5

Showing 1-10 of 25 resultsSorted by cheapest first
1
2
3

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 round-trip 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 Toronto to Portsmouth takes 19 hours 10 minutes. Flights to Portsmouth from other popular cities in Canada 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 Toronto to Portsmouth are scheduled on a Friday (39 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (27 on average).

What are the most popular airlines that fly to Portsmouth?

The most popular airlines flying from Toronto to Portsmouth are Aer Lingus and KLM.

Aer Lingus
Aer Lingus
From C$ 1,016
KLM
KLM
From C$ 1,037

What are the cheapest airlines that fly to Portsmouth?

The cheapest airlines flying from Toronto to Portsmouth are KLM and Aer Lingus.

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).

Reviews of airlines servicing Portsmouth

Get insights into the airlines that provide service to Portsmouth. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Portsmouth. Reviews last updated 25 May 2026.
See what other customers who have flown with KLM and Aer Lingus to the United Kingdom have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,522 reviews
Check prices

Entertainment

7.2

Food

7.3

Crew

8.4

Overall

7.8

Boarding

7.8

Comfort

7.7

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
KLM
7.8
Good
1,522 reviews
KLM
7.8
Good
1,522 reviews
Check prices

Entertainment

7.2

Food

7.3

Crew

8.4

Overall

7.8

Boarding

7.8

Comfort

7.7

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Aer Lingus
7.3
Good
1,581 reviews
KLM
7.8
Good
1,522 reviews
Check prices

Entertainment

7.2

Food

7.3

Crew

8.4

Overall

7.8

Boarding

7.8

Comfort

7.7

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

FAQs about flying to Portsmouth

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

    Yes, flights with layovers 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, WestJet is rated the highest out of the airlines that fly to Portsmouth.

  • How much is a round-trip flight to Portsmouth?

    A round-trip flight to Portsmouth will typically cost around C$ 1,925, however they can be found for as little as C$ 156.

  • Where does the fastest flight to Portsmouth depart from?

    For those looking to save time traveling to Portsmouth, Toronto offers the quickest one-way flight (9 hours 30 minutes).

  • Does London Heathrow have rental cars?

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

  • Are there hotels close to London Heathrow?

    Yes. London Heathrow has hotels nearby for those requiring accommodations. Aeropartment & Aerotel, London Heathrow Airport, Terminal 4, Ev Stations & Cheap Parking On Site! is the closest property to London Heathrow (0.0 km away from London Heathrow).

See more FAQs

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