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Cheap flights from Ottawa to Portsmouth from C$ 559

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 16/10. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — LHR
5 May — 12 May1
1 adult

Cheap flight deals from Ottawa to Portsmouth

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

Round-trip from

C$ 1,546

One-way from

C$ 559

Popular in

December

Cheapest in

February

Average price

C$ 990
Aer Lingus
  • Aer Lingus
  • 9/8-17/8
  • 4 total stops
  • 41h 45m total
  • Ottawa to Portsmouth
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16/10
  • 16/10
  • 3 total stops
  • 25h 30m total
  • Ottawa to Portsmouth
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (C$ 85 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 33 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
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Find flight deals from Ottawa to Portsmouth

Cheapest flights from Ottawa to Portsmouth
Explore the most affordable flight options available from Ottawa to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 30 April 2025.

Sat 9/81:55 p.m.YOW - SOU
2 stops13h 40mAer Lingus
Sun 17/88:00 p.m.SOU - YOW
2 stops28h 05mAer Lingus
Deal found 29/4C$ 1,546
Tue 20/55:55 a.m.YOW - SOU
2 stops21h 50mKLM
Mon 2/69:20 a.m.SOU - YOW
2 stops20h 02mKLM
Deal found 28/4C$ 1,799
Sat 9/81:55 p.m.YOW - SOU
2 stops13h 40mMultiple Airlines
Sun 17/812:35 p.m.SOU - YOW
3 stops35h 30mMultiple Airlines
Deal found 28/4C$ 1,808

Cheapflights Fare Finder

Customize your flight search to find flights from Ottawa 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 April 2025.
Use the filters below to find and compare flights from Ottawa to Portsmouth that are best for you.

Fly from

Ottawa

Fly to

Portsmouth

Route

Depart

Return

Price

OttawaSouthampton

YOW - SOU

YOWSOU

Ottawa

Sat 9/8

1:55 p.m.-8:35 a.m.

2 stops13h 40m

Southampton Eastleigh

Sun 17/8

8:00 p.m.-7:05 p.m.

2 stops28h 05m

C$ 1,546

OttawaSouthampton

YOW - SOU

YOWSOU

Ottawa

Tue 20/5

5:55 a.m.-8:45 a.m.

2 stops21h 50m

Southampton Eastleigh

Mon 2/6

9:20 a.m.-12:22 a.m.

2 stops20h 02m

C$ 1,799

OttawaSouthampton

YOW - SOU

YOWSOU

Ottawa

Sat 9/8

1:55 p.m.-8:35 a.m.

2 stops13h 40m

Southampton Eastleigh

Sun 17/8

12:35 p.m.-7:05 p.m.

3 stops35h 30m

C$ 1,808

OttawaSouthampton

YOW - SOU

YOWSOU

Ottawa

Thu 16/10

12:25 p.m.-6:55 p.m.

3 stops25h 30m

C$ 559

OttawaSouthampton

YOW - SOU

YOWSOU

Ottawa

Thu 16/10

11:55 a.m.-8:40 a.m.

2 stops15h 45m

C$ 839

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/4

Best time to book a flight from Ottawa to Portsmouth

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

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

Currently, January is the cheapest month in which you can book a flight from Ottawa to Portsmouth (average of C$ 560). Flying from Ottawa to Portsmouth in July is currently the most expensive (average of C$ 870). 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 YOW to P0R?

Find hourly flight availability from Ottawa 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 April 2025.

When flying from Ottawa 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.

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 30 April 2025.
KLM
7.8
Good
1,333 reviews
Check prices

Entertainment

7.1

Boarding

7.8

Overall

7.8

Crew

8.4

Food

7.2

Comfort

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
KLM
7.8
Good
1,333 reviews
KLM
7.8
Good
1,333 reviews
Check prices

Entertainment

7.1

Boarding

7.8

Overall

7.8

Crew

8.4

Food

7.2

Comfort

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
Aer Lingus
7.0
Good
1,076 reviews
KLM
7.8
Good
1,333 reviews
Check prices

Entertainment

7.1

Boarding

7.8

Overall

7.8

Crew

8.4

Food

7.2

Comfort

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.

Related info for your journey

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

  • What airport do you fly from for flights from Ottawa to Portsmouth?

    Located just 10.6 km from the city centre, Ottawa is the airport most travellers will use when flying to Portsmouth from Ottawa. Booking flights from Ottawa (YOW) to Portsmouth should be relatively easy as there are 0 daily outbound flights to Portsmouth from 6 different airlines.

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

    Consider Air Canada (89%), Aegean Airlines (89%) or Austrian Airlines (89%) when booking your flight. These represent the most reliable airlines when flying from Ottawa to Portsmouth.

  • What are the cheapest flights from Ottawa to Portsmouth?

    Looking at all options, your cheapest flight can be booked for C$ 746. While the most popular route (Ottawa - Southampton Eastleigh) can be booked for C$ 1,546 on average our data indicates C$ 1,057 when flying from Ottawa to Portsmouth.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Ottawa to Portsmouth (average of C$ 560). Flying from Ottawa to Portsmouth in July is currently the most expensive (average of C$ 870). 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 Ottawa to Portsmouth

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Top 6 airlines flying from Ottawa to Portsmouth

Discover the top 6 airlines that operate flights from Ottawa 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 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapestC$ 734AverageC$ 825FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Air FranceCheapestC$ 734AverageC$ 923FlexibilityNo cancel feeOn-time77%
Search Air France flights
Air TransatCheapestC$ 797AverageC$ 1,037FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Porter AirlinesCheapestC$ 905AverageC$ 1,069FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
Air CanadaCheapestC$ 908AverageC$ 1,070FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
LufthansaCheapestC$ 951AverageC$ 1,052FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

Fly with Cheapflights

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

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

Certainly. Search results for flights to Portsmouth from Ottawa shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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