Cheap flights from Helena to San Francisco

One-way fares from $458 · HLN → SFO · prices found by travellers in the last 48 hours

Compare all dates San Francisco → Helena
Cheapest fare
$458

United Airlines · Fri, Nov 13

Cheapest month
November

from $458

Direct flights
Not recently

Usually 1+ stop

Quickest trip
6h 02m

1,300 km

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Cheapest month to fly from Helena to San Francisco

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

  1. November 2026 Cheapest $458

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About flights from Helena to San Francisco

Helena (HLN) and San Francisco (SFO) are about 1,300 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 02m. Over the next few months, one-way fares start from $458, 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 Helena to San Francisco?

The cheapest one-way fare we've seen recently is $458 with United Airlines, departing Friday, November 13, 2026.

What is the cheapest month to fly from Helena to San Francisco?

November 2026 currently has the lowest fares, from $458 one way.

Are there direct flights from Helena to San Francisco?

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

How long is the flight from Helena to San Francisco?

The quickest journey we've seen takes about 6h 02m. Helena and San Francisco are around 1,300 km apart.

Which airlines fly from Helena to San Francisco?

Recent fares on this route were with United Airlines.

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