Cheap flights from Billings to Watertown

One-way fares from $424 · BIL → ATY · prices found by travellers in the last 48 hours

Compare all dates Watertown → Billings
Cheapest fare
$424

United Airlines · Thu, Nov 12

Cheapest month
November

from $424

Direct flights
Not recently

Usually 1+ stop

Quickest trip
3h 41m

890 km

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Cheapest month to fly from Billings to Watertown

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

  1. November 2026 Cheapest $424

Cheapest dates in November 2026

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

United Airlines
Depart10:30 Thu, Nov 12BIL → ATY 3h 41m · 1 stop
$424one way, per person
View deal
See every date in November 2026 →

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

Where to stay

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Things to do

Things to do in WatertownTours, attractions and day trips on Klook Explore →

Getting around

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About flights from Billings to Watertown

Billings (BIL) and Watertown (ATY) are about 890 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 3h 41m. Over the next few months, one-way fares start from $424, and November 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 Billings to Watertown?

The cheapest one-way fare we've seen recently is $424 with United Airlines, departing Thursday, November 12, 2026.

What is the cheapest month to fly from Billings to Watertown?

November 2026 currently has the lowest fares, from $424 one way.

Are there direct flights from Billings to Watertown?

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

How long is the flight from Billings to Watertown?

The quickest journey we've seen takes about 3h 41m. Billings and Watertown are around 890 km apart.

Which airlines fly from Billings to Watertown?

Recent fares on this route were with United Airlines.

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