Cheap flights from London to Ottawa

October is the cheapest month to fly this route, and the price calendar usually shows the gap clearly against the summer weeks. Fares climb through late June, July and August, when Ottawa fills with visitors and Londoners head away, and again around Christmas and New Year. Late autumn and the stretch from January to March are quieter, though Ottawa winters bite and a connection through a snowbound hub can slip. Midweek departures tend to cost less than Friday and Sunday flights. Book a few months ahead for summer and the December holidays; for October and November you can often wait and watch the calendar.

The route draws a mix of full-service and leisure carriers rather than low-cost ones. British Airways and Virgin Atlantic are the familiar names on the London side, with Air Transat and WestJet covering the Canadian and leisure end of the market. Air France, KLM Royal Dutch Airlines, Icelandair, Delta Air Lines, Turkish Airlines and LOT Polish Airlines tend to feed the route through their hubs, which is where the cheaper fares often sit. What you get differs by fare family more than by airline: a light ticket may exclude a checked bag and seat selection, while a flexible fare bundles them. Compare the total, not the headline.

Ottawa International is where you land, and it sits outside the city centre — a short drive or bus ride rather than a walk. Taxis, rideshares and the local bus network are the usual ways in, and a rental car makes sense if you plan to leave the city. Allow time at the border: you clear Canadian customs and immigration on arrival, and the queue can be long when several long-haul flights land together. On the London end, check which airport your return leaves from before you book a transfer, since fares on this route use Heathrow, Gatwick, City, Luton and Stansted.

Currency

CAD ($)

Power sockets

Type A, B · 120 V

Language

English, French

Emergency number

911

Driving side

right

Calling code

+1

Internet domain

.ca

Population of Ottawa

1.0 M (2021)

Time zone

UTC-04 (America/Toronto)

Country facts: Wikidata

• Check which London airport your fare leaves from, since Heathrow, Gatwick, City, Luton and Stansted are all in play and switching between them eats a day.
• Confirm what your fare includes for checked and cabin bags, especially on the lightest fare families.
• If your itinerary is pieced together from separate tickets, leave a long buffer for the connection.
• Check Canada's entry requirements and make sure your passport is valid for the whole trip.
• Look at the price calendar before you fix dates, because October is usually the cheapest month here.
• Decide whether a direct flight or a cheaper connecting itinerary matters more to you.