Cheap flights from Ottawa to Seattle

One-way fares from $177 · YOW → SEA · prices found by travellers in the last 48 hours

Compare all dates Seattle → Ottawa
Cheapest fare
$177

WestJet · Tue, Dec 1

Cheapest month
December

from $177

Direct flights
Not recently

Usually 1+ stop

Quickest trip
6h 40m

3,520 km

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Cheapest month to fly from Ottawa to Seattle

Lowest one-way fare per person in each month. Choose a month to see every date.

  1. November 2026 $649
  2. December 2026 Cheapest $177

Cheapest dates in December 2026

The lowest fares we've seen for each day, cheapest first.

WestJet
Depart06:10 Tue, Dec 1YOW → SEA 6h 40m · 1 stop
$177one way, per person
View deal
See every date in December 2026 →

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Where to stay, what to do and getting around, from our travel partners.

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Getting around

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About flights from Ottawa to Seattle

Ottawa (YOW) and Seattle (SEA) are about 3,520 km apart. We haven't seen direct fares on this route recently, so expect at least one stop; the quickest journey we've seen takes about 6h 40m. Over the next few months, one-way fares start from $177, and December 2026 is currently the cheapest month to fly.

These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.

Frequently asked questions

How much is a flight from Ottawa to Seattle?

The cheapest one-way fare we've seen recently is $177 with WestJet, departing Tuesday, December 1, 2026. Over the coming months, the lowest fare in each month ranges from $177 to $649.

What is the cheapest month to fly from Ottawa to Seattle?

December 2026 currently has the lowest fares, from $177 one way.

Are there direct flights from Ottawa to Seattle?

We haven't seen direct fares recently, so most journeys include at least one stop.

How long is the flight from Ottawa to Seattle?

The quickest journey we've seen takes about 6h 40m. Ottawa and Seattle are around 3,520 km apart.

Which airlines fly from Ottawa to Seattle?

Recent fares on this route were with Air Canada and WestJet.

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