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Cheap flights from Montreal to Portsmouth from C$ 522

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 13/4. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — LHR
31 Mar — 7 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Montreal to Portsmouth

Enter your travel dates to find the best prices.

Cheapest flights from Montreal to Portsmouth
Explore the most affordable flight options available from Montreal to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 March 2026.

Fri 15/511:00 p.m.
YUL
-
SOU
1 stop15h 30m
Multiple Airlines
Fri 29/59:25 a.m.
SOU
-
YUL
2 stops16h 35m
Multiple Airlines
Deal found 1/3C$ 1,030
Fri 15/511:00 p.m.
YUL
-
SOU
1 stop15h 30m
Multiple Airlines
Thu 28/58:00 p.m.
SOU
-
YUL
2 stops27h 20m
Multiple Airlines
Deal found 1/3C$ 1,062
Wed 13/511:45 p.m.
YUL
-
SOU
1 stop28h 00m
Multiple Airlines
Fri 29/59:25 a.m.
SOU
-
YUL
1 stop12h 55m
Multiple Airlines
Deal found 26/2C$ 1,144
Wed 13/56:50 p.m.
YUL
-
SOU
1 stop17h 00m
Delta
Mon 18/55:20 p.m.
SOU
-
YUL
1 stop28h 35m
Delta
Deal found 25/2C$ 1,200
Tue 26/56:50 p.m.
YUL
-
SOU
1 stop17h 00m
Delta
Sun 7/69:15 a.m.
SOU
-
YUL
1 stop12h 40m
Delta
Deal found 1/3C$ 1,207
Wed 27/56:45 a.m.
YUL
-
SOU
3 stops31h 45m
Multiple Airlines
Sun 7/62:50 p.m.
SOU
-
YUL
3 stops32h 30m
Multiple Airlines
Deal found 27/2C$ 1,225
Wed 11/38:10 p.m.
YUL
-
SOU
1 stop17h 15m
Delta
Sun 15/35:45 p.m.
SOU
-
YUL
1 stop28h 35m
Delta
Deal found 25/2C$ 1,231
Wed 27/56:50 p.m.
YUL
-
SOU
1 stop17h 00m
Virgin Atlantic
Sun 7/69:15 a.m.
SOU
-
YUL
1 stop12h 40m
Virgin Atlantic
Deal found 27/2C$ 1,278

Find flight deals from Montreal to Portsmouth

Keep the following information in mind while searching for Montreal to Portsmouth flight deals. Data was last updated 1 March 2026.

Round-trip from

C$ 1,030

One-way from

C$ 522

Popular in

December

Cheapest in

May

Average price

C$ 952
15/5-29/5
  • 15/5-29/5
  • 3 total stops
  • 32h 05m total
  • Montreal to Portsmouth
Search Deals
13/4
  • 13/4
  • 3 total stops
  • 48h 15m total
  • Montreal to Portsmouth
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (C$ 17 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (C$ 25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Montreal to Portsmouth 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 629,999 searches. Data last updated 1 March 2026.
Use the filters below to find and compare flights from Montreal to Portsmouth that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Wed 11/3

8:10 p.m.-8:20 a.m.

1 stop32h 10m

Southampton Eastleigh

Sun 15/3

5:45 p.m.-6:20 p.m.

1 stop28h 35m

C$ 1,233

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Tue 26/5

5:00 p.m.-4:50 p.m.

2 stops18h 50m

Southampton Eastleigh

Sun 7/6

5:20 p.m.-4:55 p.m.

1 stop28h 35m

C$ 1,319

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Sun 10/5

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

1 stop17h 00m

Southampton Eastleigh

Sat 16/5

5:20 p.m.-4:55 p.m.

1 stop28h 35m

C$ 1,396

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Fri 15/5

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

2 stops16h 50m

Southampton Eastleigh

Thu 28/5

5:20 p.m.-3:05 p.m.

2 stops26h 45m

C$ 1,600

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Mon 16/3

8:05 p.m.-5:00 p.m.

2 stops16h 55m

Southampton Eastleigh

Sun 23/8

5:30 p.m.-12:00 p.m.

2 stops23h 30m

C$ 1,601

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Thu 16/7

6:50 p.m.-5:35 p.m.

1 stop17h 45m

Southampton Eastleigh

Sun 2/8

5:30 p.m.-4:55 p.m.

1 stop28h 25m

C$ 1,713

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Thu 16/7

6:50 p.m.-5:35 p.m.

1 stop17h 45m

Southampton Eastleigh

Thu 30/7

9:15 a.m.-4:55 p.m.

1 stop12h 40m

C$ 1,732

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Thu 16/7

6:50 p.m.-5:35 p.m.

1 stop17h 45m

Southampton Eastleigh

Fri 31/7

6:05 p.m.-4:55 p.m.

1 stop27h 50m

C$ 1,732

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Sat 18/7

6:00 a.m.-8:45 a.m.

2 stops45h 45m

Southampton Eastleigh

Thu 30/7

9:15 a.m.-4:55 p.m.

1 stop12h 40m

C$ 1,771

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Sun 12/4

11:00 p.m.-5:15 p.m.

3 stops37h 15m

C$ 541

Flights are sorted by cheapest round-trip flights first.

Deals found on 25/2

Showing 1-10 of 14 resultsSorted by cheapest first
1
2

Best time to book a flight from Montreal to Portsmouth

Have a flexible travel schedule? Discover the best time to fly to Portsmouth from Montreal 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 from Montreal to Portsmouth

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

Currently, December is the cheapest month in which you can book a flight from Montreal to Portsmouth (average of C$ 469). Flying from Montreal to Portsmouth in July is currently the most expensive (average of C$ 880). 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 YMQ to P0R?

Find hourly flight availability from Montreal to Portsmouth. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 1 March 2026.

When flying from Montreal to Portsmouth, 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 Montreal to Portsmouth

Explore weekly flight availability from Montreal to Portsmouth. 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 1 March 2026.

The most flights from YMQ to P0R are scheduled on a Saturday (13 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (6 on average).

Related info for your journey

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

  • How long is the flight from Montreal to Portsmouth?

    There are many flights that can get you from Montreal to Portsmouth in 18h 50m. Fly via Delta or KLM to get the fastest option. There are 5177 km between Montreal and Portsmouth. Both multi-stop and direct flights can be found to your destination and back.

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

    No one likes to see their flight delayed. When booking a flight from Montreal to Portsmouth consider choosing Aegean Airlines (65%), Air Canada (55%) or Austrian Airlines (55%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Montreal to Portsmouth?

    On average you can expect to pay C$ 1,512 for a flight from Montreal to Portsmouth. The cheapest flight overall is C$ 779 while the most popular route, (Montreal Pierre Elliott Trudeau Intl - Southampton Eastleigh) is currently priced at C$ 1,144.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Montreal to Portsmouth 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 Montreal to Portsmouth?

    Currently, December is the cheapest month in which you can book a flight from Montreal to Portsmouth (average of C$ 469). Flying from Montreal to Portsmouth in July is currently the most expensive (average of C$ 880). 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 Montreal to Portsmouth

Discover the top 10 airlines that operate flights from Montreal to Portsmouth. 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 629,999 searches. Data last updated 1 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Air TransatCheapestC$ 648AverageC$ 962FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
TAP AIR PORTUGALCheapestC$ 672AverageC$ 729FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
British AirwaysCheapestC$ 722AverageC$ 1,018FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Porter AirlinesCheapestC$ 722AverageC$ 966FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 742AverageC$ 1,011FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
LufthansaCheapestC$ 748AverageC$ 1,004FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air FranceCheapestC$ 756AverageC$ 1,189FlexibilityNo cancel feeOn-time77%
Search Air France flights
American AirlinesCheapestC$ 768AverageC$ 1,010FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Virgin AtlanticCheapestC$ 782AverageC$ 1,078FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
FinnairCheapestC$ 930AverageC$ 1,101FlexibilityNo cancel feeOn-time76%
Search Finnair flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Deals for Montreal to Portsmouth flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

Millions of users choose and trust Cheapflights to book the best flight deals from Montreal to Portsmouth for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Montreal to Portsmouth with no change fees?

Yes, we can. To see specific flights from Montreal to Portsmouth with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Of course! You can now track prices for flights from Montreal to Portsmouth 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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