Find flights
When to book
Airlines
FAQs

Cheap flights from Montreal to Portsmouth from C$ 466

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 14/9. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — LHR
5 Aug — 12 Aug1
1 adult

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 31 July 2025.

Round-trip from

C$ 941

One-way from

C$ 466

Popular in

December

Cheapest in

May

Average price

C$ 1,075
Delta
  • Delta
  • 13/10-23/10
  • 2 total stops
  • 29h 45m total
  • Montreal to Portsmouth
Search Deals
14/9
  • 14/9
  • 2 total stops
  • 44h 30m total
  • Montreal to Portsmouth
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (C$ 97 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals

Find flight deals from Montreal to Portsmouth

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 31 July 2025.

Mon 13/106:50 p.m.YUL - SOU
1 stop17h 10mDelta
Thu 23/109:20 a.m.SOU - YUL
1 stop12h 35mDelta
Deal found 30/7C$ 941
Mon 8/96:50 p.m.YUL - SOU
1 stop17h 10mKLM
Mon 15/99:20 a.m.SOU - YUL
1 stop12h 35mKLM
Deal found 30/7C$ 1,275
Mon 8/98:40 p.m.YUL - SOU
1 stop17h 50mMultiple Airlines
Mon 15/98:00 p.m.SOU - YUL
1 stop19h 50mMultiple Airlines
Deal found 31/7C$ 1,308
Mon 13/102:10 p.m.YUL - SOU
2 stops13h 05mAer Lingus
Thu 23/109:40 a.m.SOU - YUL
2 stops20h 00mAer Lingus
Deal found 30/7C$ 1,324
Mon 3/118:40 p.m.YUL - SOU
2 stops17h 45mBritish Airways
Sun 9/117:55 p.m.SOU - YUL
2 stops27h 50mBritish Airways
Deal found 28/7C$ 1,453

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 31 July 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

Mon 13/10

6:50 p.m.-5:00 p.m.

1 stop17h 10m

Southampton Eastleigh

Thu 23/10

9:20 a.m.-4:55 p.m.

1 stop12h 35m

C$ 941

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Mon 8/9

6:50 p.m.-5:00 p.m.

1 stop17h 10m

Southampton Eastleigh

Mon 15/9

9:20 a.m.-4:55 p.m.

1 stop12h 35m

C$ 1,275

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Mon 8/9

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

1 stop17h 50m

Southampton Eastleigh

Mon 15/9

8:00 p.m.-10:50 a.m.

1 stop19h 50m

C$ 1,308

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Mon 13/10

2:10 p.m.-8:15 a.m.

2 stops13h 05m

Southampton Eastleigh

Thu 23/10

9:40 a.m.-12:40 a.m.

2 stops20h 00m

C$ 1,324

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Mon 8/9

10:10 p.m.-7:25 p.m.

2 stops16h 15m

Southampton Eastleigh

Mon 15/9

8:40 a.m.-8:15 p.m.

2 stops16h 35m

C$ 1,807

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Sun 14/9

6:45 a.m.-8:15 a.m.

2 stops44h 30m

C$ 466

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Mon 13/10

6:50 p.m.-5:00 p.m.

1 stop17h 10m

C$ 919

MontrealSouthampton

YUL - SOU

YULSOU

Montreal Pierre Elliott Trudeau Intl

Sun 14/9

6:50 p.m.-5:00 p.m.

1 stop17h 10m

C$ 1,162

Flights are sorted by cheapest round-trip flights first.

Deals found on 30/7

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, January is the cheapest month in which you can book a flight from Montreal to Portsmouth (average of C$ 560). Flying from Montreal to Portsmouth in July is currently the most expensive (average of C$ 857). 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 31 July 2025.

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.

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 15 September 2024.

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

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 31 July 2025.

The most flights from YMQ to P0R are scheduled on a Wednesday (17 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (12 on average).

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 31 July 2025.
Get a feel of what it's like to fly with Delta,KLM, andAer Lingus from Montreal to Portsmouth by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,981 reviews
Check prices

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,981 reviews
Delta
8.0
Very good
7,981 reviews
Check prices

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,383 reviews
Delta
8.0
Very good
7,981 reviews
Check prices

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Aer Lingus
7.1
Good
1,192 reviews
Delta
8.0
Very good
7,981 reviews
Check prices

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
British Airways
6.6
Okay
7,222 reviews
Delta
8.0
Very good
7,981 reviews
Check prices

Food

7.3

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • What are the cheapest airlines to fly from Montreal to Portsmouth one-way?

    For one-way options, check prices for Delta. According to our data, you can fly for as low as C$ 919. Users have also found prices from C$ 1,162 and C$ 1,201 on KLM and British Airways, respectively.

  • 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 Austrian Airlines (88%), United Airlines (88%) or Lufthansa (88%) 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$ 2,125 for a flight from Montreal to Portsmouth. The cheapest flight overall is C$ 437 while the most popular route, (Montreal Pierre Elliott Trudeau Intl - Southampton Eastleigh) is currently priced at C$ 941.

  • 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, January is the cheapest month in which you can book a flight from Montreal to Portsmouth (average of C$ 560). Flying from Montreal to Portsmouth in July is currently the most expensive (average of C$ 857). 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.

Alternative routes for Montreal to Portsmouth

See prices for flight routes from nearby airports that may be better suited for you.
Pierre Elliott Trudeau Intl to Heathrow flights
Pierre Elliott Trudeau Intl to Gatwick flights
Pierre Elliott Trudeau Intl to London City flights
Pierre Elliott Trudeau Intl to Luton flights
Pierre Elliott Trudeau Intl to Stansted flights
Ottawa to Heathrow flights
Ottawa to Gatwick flights
Pierre Elliott Trudeau Intl to Edinburgh flights
Pierre Elliott Trudeau Intl to Southend flights
Ottawa to London City flights
Québec City to Heathrow flights
Pierre Elliott Trudeau Intl to Manchester flights
Québec City to Gatwick flights
Québec City to London City flights
Ottawa to Edinburgh flights
Québec City to Edinburgh flights
Ottawa to Southampton flights
Ottawa to Manchester flights
Ottawa to Stansted flights
Ottawa to Birmingham flights
Pierre Elliott Trudeau Intl to Southampton flights
Pierre Elliott Trudeau Intl to Liverpool flights
Pierre Elliott Trudeau Intl to Birmingham flights
Québec City to Luton flights
Ottawa to Luton flights
Pierre Elliott Trudeau Intl to Leeds flights
Pierre Elliott Trudeau Intl to Newcastle upon Tyne flights
Ottawa to Southend flights
Québec City to Stansted flights
Pierre Elliott Trudeau Intl to Bristol 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 31 July 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapestC$ 604AverageC$ 681FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Air TransatCheapestC$ 657AverageC$ 979FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Porter AirlinesCheapestC$ 719AverageC$ 892FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 751AverageC$ 998FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
LufthansaCheapestC$ 764AverageC$ 1,007FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Virgin AtlanticCheapestC$ 770AverageC$ 866FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapestC$ 791AverageC$ 1,032FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapestC$ 805AverageC$ 1,184FlexibilityNo cancel feeOn-time75%
Search KLM flights
Air FranceCheapestC$ 818AverageC$ 917FlexibilityNo cancel feeOn-time77%
Search Air France flights
American AirlinesCheapestC$ 925AverageC$ 1,130FlexibilityNo cancel feeOn-time71%
Search American Airlines 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.