San Diego to Billings flights

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Lowest observed

€169

Cheapest month

December 2026

Last checked

11 Oct 2026

Observed fares. Prices may change.

Your next trip, last seen at €169

19 Dec 2026

1 stop · One way

Cheapest observed day · Last checked: 11 Oct 2026

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The lowest fare we observed for each month. Open a month to see its days, then pick your outbound and return. A day with no price is one we will search for you.

Prices are for observed departure and return date pairs. No data does not mean no flights.

Lowest observed: €169, departing 19 Dec 2026 (Last checked: 11 Oct 2026)One-way fareCheck live prices for this route
Airlines seen: Alaska Airlines, Allegiant Air, American Airlines, Frontier Airlines, United Airlines, WestJet
Typical journey time: 7h 51m

Short answer

We have seen Alaska Airlines fares from San Diego to Billings. The lowest fare our own searches returned is €169, seen on 11 Oct 2026. December 2026 is the cheapest month in our observations, at €169. These are prices our searches returned on the dates shown, not quotes; run a live search for today's fare.

About this route

Explore the fares we observed from San Diego to Billings. Prices move often, so pick your dates to see the latest options.

Route distance: 1,631 km
Typical journey time: 7h 51m
Airlines seen: Alaska Airlines, Allegiant Air, American Airlines, Frontier Airlines, United Airlines, WestJet
Seen on fares with a connection: Alaska Airlines, Frontier Airlines, United Airlines, Allegiant Air
Alternative airports: CLD

Route-level information; individual journeys vary.
We have not observed non-stop service on this route; the fares shown include at least one stop.

A clearer picture of your fare

Observed, not guaranteed

Every price is a fare we actually saw, and it may change at any time.

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The price is final on the provider's site, where your booking is completed.

How our prices work

Airport to city: straight-line distance

San Diego International Airport (SAN) → San Diego, city gazetteer reference point (32.7153, -117.1573): ≈ 4 km.
McClellan-Palomar Airport (CLD) → San Diego, city gazetteer reference point (32.7153, -117.1573): ≈ 47 km.
Billings Logan International Airport (BIL) → Billings, city gazetteer reference point (45.7833, -108.5007): ≈ 4 km.

Approximate distances calculated from coordinates, not road distances or travel times. These airports serve the city; they are not confirmed endpoints of an offer.

Frequently asked

How much is a flight from San Diego to Billings?

The lowest fare we have observed is €169, found on 11 Oct 2026. Prices move, so read it as a floor rather than a quote.

When is the cheapest month to fly from San Diego to Billings?

In our observations December 2026 is the cheapest month so far, at €169.

Are there direct flights from San Diego to Billings?

Our data holds no non-stop flight from San Diego to Billings. The fares on this page include at least one stop.

Which airlines fly from San Diego to Billings?

These are the carriers we have seen on the route: Alaska Airlines, Allegiant Air, American Airlines, Frontier Airlines, United Airlines, WestJet.

How long does the flight from San Diego to Billings take?

The average journey time across the 85 fares we observed is 12h 21m, including any stops. Individual departures vary; the fastest observed flight is listed in the route facts above.

How many of the observed San Diego to Billings fares were non-stop?

None of the 86 fares we observed was non-stop; every one included at least one stop. That describes our observations, not every flight that operates.

How observed prices work, what "No data" means and what a fare includes: Read the flight price guide