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United Airlines flights from Ottawa to London Heathrow Airport (YOW - LHR)

YOW — LHR
13 Jul — 20 Jul1
1 adult
1 adult, Economy, 0 bags

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Cheapest United Airlines flights from Ottawa to Heathrow
Explore the most affordable United Airlines flight options available from Ottawa to Heathrow. Find the lowest fares with prices last updated on 13 June 2026.

Tue 16/66:05 a.m.
YOW
-
LHR
2 stops19h 50m
United Airlines
Tue 23/610:50 a.m.
LHR
-
YOW
2 stops18h 04m
United Airlines
Deal found 11/6C$ 952
Mon 15/66:00 a.m.
YOW
-
LHR
1 stop23h 40m
United Airlines
Mon 22/66:50 a.m.
LHR
-
YOW
2 stops22h 04m
United Airlines
Deal found 10/6C$ 955
Fri 12/65:25 p.m.
YOW
-
LHR
1 stop13h 30m
United Airlines
Tue 16/64:00 p.m.
LHR
-
YOW
2 stops23h 03m
United Airlines
Deal found 10/6C$ 969

  • How do most travelers feel about United Airlines?

    United Airlines has received a 7.4/10 rating from 9,815 Cheapflights user reviews. If you wish to plan your next trip from Ottawa to London Heathrow Airport with United Airlines, enter your preferred travel dates above!

  • Can I get a flight from Ottawa to London Heathrow Airport on United Airlines for under C$ 1,258?

    There are 10 flights available on United Airlines from Ottawa to London Heathrow Airport for under C$ 1,258. These prices can change based on many factors including date and time. To find YOW-LHR flight prices for your dates, click here.

United Airlines flights from Ottawa to Heathrow in 2026

Find detailed information about United Airlines flights from Ottawa to Heathrow. Explore the options provided by United Airlines to plan your journey from Ottawa to Heathrow. Data last updated 13 June 2026.

One-way from

C$ 527

Round-trip from

C$ 944

Popular in

December

Cheapest in

November

Average price (all airlines)

C$ 1,232
United Airlines
  • United Airlines
  • 21/7
  • 2 total stops
  • 18h 30m total
  • Ottawa to London
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United Airlines
  • United Airlines
  • 12/9-19/9
  • 3 total stops
  • 31h 14m total
  • Ottawa to London
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Highest demand for flights from Ottawa to London Heathrow; 0% potential price increase.
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Best time to find cheap flights from Ottawa to London Heathrow; 2% potential price drop.
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Average price for all Ottawa to London Heathrow flights (one-way and round-trip).
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Rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 mm per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

Temperature in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London Heathrow Airport, 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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

Best time to book a flight from Ottawa to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow 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.

Browse thousands of different options on Cheapflights for your next trip

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Fly from Ottawa to Heathrow on another airline

Consider alternative airlines that service the Heathrow area. Flight routes are based on user searches made on Cheapflights and were last updated on 13 June 2026.
Air Canada flights from Ottawa to London Heathrow
Lufthansa flights from Ottawa to London Heathrow

See what others are saying about United Airlines

Read reviews and see what other travellers are saying about their experiences with United Airlines. Get insights from real passengers regarding the airline's services, customer satisfaction, and overall travel experience. Use these reviews to inform your decision when choosing United Airlines for your next flight. Reviews last updated 13 June 2026.
United Airlines
7.4
Good
9,820 reviews
Check prices
Overview

Comfort

7.3

Entertainment

7.1

Boarding

7.7

Crew

8.1

Food

6.6

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