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Cheap flights from Montreal to Portsmouth from C$ 620

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 10/1. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — LHR
29 nov. — 6 dic.1
1 adult
1 adult, Economy, 0 bags

Find 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 30 octubre 2025.

mar. 4/116:00 a.m.YUL - SOU
2 stops30h 00mDelta
lun. 13/45:35 p.m.SOU - YUL
1 stop28h 20mDelta
Deal found 28/10C$ 1,177
mar. 4/116:00 a.m.YUL - SOU
2 stops30h 00mDelta
mar. 7/45:35 p.m.SOU - YUL
2 stops34h 37mDelta
Deal found 28/10C$ 1,211
mar. 4/116:00 a.m.YUL - SOU
2 stops45h 20mDelta
jue. 9/49:20 a.m.SOU - YUL
1 stop12h 35mDelta
Deal found 28/10C$ 1,227
mar. 4/116:00 a.m.YUL - SOU
2 stops30h 00mDelta
dom. 12/45:35 p.m.SOU - YUL
1 stop28h 20mDelta
Deal found 28/10C$ 1,253
mar. 4/116:00 a.m.YUL - SOU
2 stops45h 20mDelta
mié. 8/45:35 p.m.SOU - YUL
1 stop28h 20mDelta
Deal found 28/10C$ 1,303
mar. 4/116:00 a.m.YUL - SOU
2 stops45h 20mDelta
sáb. 11/45:35 p.m.SOU - YUL
1 stop28h 20mDelta
Deal found 28/10C$ 1,353
lun. 3/117:10 p.m.YUL - SOU
1 stop16h 50mDelta
mar. 31/39:20 a.m.SOU - YUL
1 stop12h 35mDelta
Deal found 28/10C$ 1,468
lun. 3/117:10 p.m.YUL - SOU
1 stop32h 00mDelta
lun. 13/45:35 p.m.SOU - YUL
1 stop28h 20mDelta
Deal found 28/10C$ 1,490
lun. 3/117:10 p.m.YUL - SOU
1 stop32h 00mDelta
lun. 30/35:35 p.m.SOU - YUL
1 stop28h 20mDelta
Deal found 28/10C$ 1,493

Cheap flight deals from Montreal to Portsmouth

Keep the following information in mind while searching for Montreal to Portsmouth flight deals. Data was last updated 30 octubre 2025.

Round-trip from

C$ 1,659

One-way from

C$ 620

Popular in

December

Cheapest in

May

Average price

C$ 876
Delta
  • Delta
  • 24/12-7/1
  • 2 total stops
  • 44h 50m total
  • Montreal to Portsmouth
Search Deals
10/1
  • 10/1
  • 3 total stops
  • 30h 40m total
  • Montreal to Portsmouth
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (C$ 104 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (C$ 42 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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 30 octubre 2025.
Use the filters below to find and compare flights from Montreal to Portsmouth that are best for you.

Fly from

Montreal

Fly to

Portsmouth

Route

Depart

Return

Price

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

mié. 24/12

7:10 p.m.-8:05 a.m.

1 stop31h 55m

Southampton Eastleigh

mié. 7/1

9:25 a.m.-5:20 p.m.

1 stop12h 55m

C$ 1,659

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

mié. 24/12

7:10 p.m.-8:05 a.m.

1 stop31h 55m

Southampton Eastleigh

mar. 6/1

5:30 p.m.-5:20 p.m.

1 stop28h 50m

C$ 1,768

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

mié. 24/12

7:10 p.m.-8:05 a.m.

1 stop31h 55m

Southampton Eastleigh

jue. 1/1

6:05 p.m.-5:20 p.m.

1 stop28h 15m

C$ 1,817

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

mié. 24/12

7:10 p.m.-8:05 a.m.

1 stop31h 55m

Southampton Eastleigh

lun. 5/1

9:25 a.m.-5:20 p.m.

1 stop12h 55m

C$ 1,849

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

mié. 24/12

7:10 p.m.-8:05 a.m.

1 stop31h 55m

Southampton Eastleigh

dom. 4/1

6:05 p.m.-5:20 p.m.

1 stop28h 15m

C$ 1,849

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

dom. 23/11

8:40 p.m.-5:25 p.m.

3 stops15h 45m

Southampton Eastleigh

dom. 30/11

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

2 stops27h 45m

C$ 1,857

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

jue. 27/11

8:40 p.m.-7:30 p.m.

2 stops17h 50m

Southampton Eastleigh

dom. 7/12

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

2 stops27h 45m

C$ 1,998

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

mar. 23/12

7:00 a.m.-5:00 p.m.

2 stops29h 00m

Southampton Eastleigh

jue. 1/1

6:05 p.m.-5:20 p.m.

1 stop28h 15m

C$ 2,032

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

vie. 19/12

4:45 p.m.-5:00 p.m.

2 stops19h 15m

Southampton Eastleigh

lun. 5/1

9:25 a.m.-5:20 p.m.

1 stop12h 55m

C$ 2,032

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

mar. 23/12

7:00 a.m.-5:00 p.m.

2 stops29h 00m

Southampton Eastleigh

lun. 5/1

9:25 a.m.-5:20 p.m.

1 stop12h 55m

C$ 2,032

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/10

Showing 1-10 of 18 results
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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$ 480). Flying from Montreal to Portsmouth in July is currently the most expensive (average of C$ 901). 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 30 octubre 2025.

One of the essential ways to save on airfare from Montreal to Portsmouth is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 22% on airfare.

What is the cheapest day to fly from Montreal to Portsmouth?

Use this chart to determine the cheapest time to fly round-trip from Montreal to Portsmouth. Price data was last updated on 16 December 2024.

Travelers seeking maximum savings on their Montreal to Portsmouth flight should consider departing on Sunday mornings when fares are most often at their lowest. Tuesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 31h 55m. Fly via Delta to get the fastest option. There are 5177 km between Montreal and Portsmouth.

  • 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 (77%), Thai Airways (77%) or Air Canada (72%) 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$ 2,194 for a flight from Montreal to Portsmouth. The cheapest flight overall is C$ 434 while the most popular route, (Montreal Pierre Elliott Trudeau Intl - Southampton Eastleigh) is currently priced at C$ 1,859.

  • 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$ 480). Flying from Montreal to Portsmouth in July is currently the most expensive (average of C$ 901). 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

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Alternative routes for Montreal to Portsmouth

See prices for flight routes from nearby airports that may be better suited for you.
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Ottawa to Southampton flights
Ottawa to Southend flights
Pierre Elliott Trudeau Intl to Liverpool flights

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 30 octubre 2025.
AirlineCheapestAverageFlexibilityOn-time
Air FranceCheapestC$ 616AverageC$ 1,114FlexibilityNo cancel feeOn-time77%
Search Air France flights
TAP AIR PORTUGALCheapestC$ 638AverageC$ 720FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Air TransatCheapestC$ 639AverageC$ 991FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Porter AirlinesCheapestC$ 735AverageC$ 914FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
LufthansaCheapestC$ 766AverageC$ 1,015FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air CanadaCheapestC$ 767AverageC$ 1,026FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
British AirwaysCheapestC$ 768AverageC$ 1,022FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapestC$ 800AverageC$ 1,097FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Virgin AtlanticCheapestC$ 801AverageC$ 1,101FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
FinnairCheapestC$ 872AverageC$ 1,019FlexibilityNo 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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