Ottawa to Washington
Ottawa to Washington is cheapest from October through July, all at 562 €. September, the most expensive month we measured, costs about 36 € more.
Ottawa to Washington is 724 km flown direct. Every fare we measured came from WS.
That comes from pricing 299 departure dates across 11 months. Every figure below is a fare we measured on the day shown, not a live quote. When we have nothing fresh to say about a route, its page stops existing.
What is a good price from Ottawa to Washington?
Anything at or below the quarter mark beats three in four of the 299 one-way fares we measured here. Above the median, wait or move the date.
seen 27 Sep 2026
How far ahead do the cheap fares sit?
When we measured, the cheapest quarter of fares sat between 100 and 234 days before departure, noticeably further out than the rest of the market. If you can look a few months ahead, that is where the cheap seats are sitting.
a snapshot of where the cheap seats sat, seen 27 Sep 2026
Which day of the week is cheapest?
On average, Wednesday departures came out lowest and Sunday highest, a spread of about 54 €. On this route the day moves the price about as much as the month does, which is unusual: check both before booking.