Which layover airport offers the lowest fares from San Diego to Helena?

Flights via Seattle (SEA) offer the lowest average round-trip price of $369.

Which layover airport has the shortest travel time from San Diego to Helena?

Flights connecting via Salt Lake City (SLC) have the shortest average one-way travel time: 5h 12m.

What airlines fly to Helena?

Delta, Alaska Airlines and United Airlines are the top three most popular airlines that fly to Helena from San Diego according to our data. Delta is the first choice among our users, with 39% of people opting to fly with this airline when traveling to Helena. Keep in mind that there are 7 different airlines that fly to Helena on a routine basis, so you have a few additional options to choose from.

Which layover airport has the shortest connection time from San Diego to Helena?

Salt Lake City (SLC) has the shortest average layover time for this route: 1h 01m.

What is the cheapest airline that flies from San Diego to Helena?

Alaska Airlines, Delta, and United Airlines are the most popular carriers operating from San Diego to Helena

Which airport is the most popular layover for flights between San Diego and Helena?

Seattle (SEA) was the most common stop: 80% of momondo users choosing 1-stop flights on this route connected there.

When did momondo last update prices for flights from San Diego Airport to Helena Airport?

Prices for flights from San Diego Airport to Helena Airport are updated daily.

How many operators does momondo search for flights from San Diego Airport to Helena Airport?

As of March 2026, there is 1 operator available to choose from for flights from San Diego Airport to Helena Airport.

How old do you have to be to fly from San Diego Airport to Helena Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Diego Airport to Helena Airport.

What documentation or ID do you need to fly to Helena Airport?

The required travel and health documents for your Helena Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Helena Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$166 Cheap Flights from San Diego to Helena in 2026

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Find the cheapest flights from San Diego to Helena

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:35 pm - 5:45 pm

SAN

HLN

21h 10m

1 stop

6:22 pm - 1:27 pm

HLN

SAN

20h 05m

1 stop

$234Alaska Airlines

Tue, Apr 28 - Sat, May 2

7:35 pm - 5:45 pm

SAN

HLN

21h 10m

1 stop

6:22 pm - 12:04 pm

HLN

SAN

18h 42m

1 stop

$245Alaska Airlines

Tue, Apr 28 - Sat, May 2

7:35 pm - 5:45 pm

SAN

HLN

21h 10m

1 stop

6:22 pm - 1:27 pm

HLN

SAN

20h 05m

1 stop

$284Alaska Airlines

Tue, Apr 28 - Sat, May 2

10:01 pm - 5:45 pm

SAN

HLN

18h 44m

2 stops

6:22 pm - 1:27 pm

HLN

SAN

20h 05m

1 stop

$312Alaska Airlines

Wed, Apr 29 - Sat, May 2

6:15 am - 5:45 pm

SAN

HLN

10h 30m

1 stop

6:22 pm - 11:59 pm

HLN

SAN

6h 37m

1 stop

$321Alaska Airlines

Thu, Apr 9 - Sun, Apr 12

9:12 pm - 5:45 pm

SAN

HLN

19h 33m

2 stops

6:22 pm - 12:04 pm

HLN

SAN

18h 42m

1 stop

$326Alaska Airlines

Tue, Apr 28 - Sat, May 2

7:35 pm - 5:45 pm

SAN

HLN

21h 10m

1 stop

6:22 pm - 7:59 am

HLN

SAN

14h 37m

2 stops

$328Alaska Airlines

Tue, Apr 28 - Sat, May 2

6:15 am - 5:45 pm

SAN

HLN

10h 30m

1 stop

6:22 pm - 11:59 pm

HLN

SAN

6h 37m

1 stop

$333Alaska Airlines

Thu, Apr 9 - Sun, Apr 12

8:18 pm - 5:45 pm

SAN

HLN

20h 27m

2 stops

6:22 pm - 11:59 pm

HLN

SAN

6h 37m

1 stop

$337Alaska Airlines

Thu, Apr 9 - Sun, Apr 12

10:51 am - 5:45 pm

SAN

HLN

5h 54m

1 stop

6:22 pm - 8:39 am

HLN

SAN

15h 17m

2 stops

$344Alaska Airlines

Tue, Apr 28 - Sat, May 2

Alaska Airlines flights from San Diego to Helena

Our best Alaska Airlines deals on San Diego to Helena flight tickets

Alaska Airlines

Apr 28

SAN7:35 pmSan Diego

21h 10m

1 stop

HLN5:45 pmHelena

May 2

HLN6:22 pmHelena

20h 05m

1 stop

SAN1:27 pmSan Diego

$234

Alaska Airlines

Apr 28

SAN7:35 pmSan Diego

21h 10m

1 stop

HLN5:45 pmHelena

May 2

HLN6:22 pmHelena

18h 42m

1 stop

SAN12:04 pmSan Diego

$245

Alaska Airlines

Apr 28

SAN7:35 pmSan Diego

21h 10m

1 stop

HLN5:45 pmHelena

May 2

HLN6:22 pmHelena

20h 05m

1 stop

SAN1:27 pmSan Diego

$284

United Airlines flights from San Diego to Helena

Our best United Airlines deals on San Diego to Helena flight tickets

United Airlines

Apr 5

SAN7:14 pmSan Diego

17h 25m

1 stop

HLN1:39 pmHelena

Apr 14

HLN2:25 pmHelena

8h 05m

1 stop

SAN9:30 pmSan Diego

$451

United Airlines

Apr 5

SAN8:37 pmSan Diego

16h 02m

2 stops

HLN1:39 pmHelena

Apr 14

HLN2:25 pmHelena

8h 05m

1 stop

SAN9:30 pmSan Diego

$493

United Airlines

Apr 2

SAN6:32 amSan Diego

14h 01m

1 stop

HLN9:33 pmHelena

Apr 5

HLN6:15 amHelena

7h 37m

1 stop

SAN12:52 pmSan Diego

$552

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Tue 4/28

7:35 pm-5:45 pm

1 stop21h 10m

Helena

Sat 5/2

6:22 pm-1:27 pm

1 stop20h 05m

$234

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Tue 4/28

7:35 pm-5:45 pm

1 stop21h 10m

Helena

Sat 5/2

6:22 pm-12:04 pm

1 stop18h 42m

$245

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Tue 4/28

7:35 pm-5:45 pm

1 stop21h 10m

Helena

Sat 5/2

6:22 pm-1:27 pm

1 stop20h 05m

$284

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Wed 4/29

10:01 pm-5:45 pm

2 stops18h 44m

Helena

Sat 5/2

6:22 pm-1:27 pm

1 stop20h 05m

$312

Quickest round-trip

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Thu 4/9

6:15 am-5:45 pm

1 stop10h 30m

Helena

Sun 4/12

6:22 pm-11:59 pm

1 stop6h 37m

$321

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Tue 4/28

9:12 pm-5:45 pm

2 stops19h 33m

Helena

Sat 5/2

6:22 pm-12:04 pm

1 stop18h 42m

$326

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Tue 4/28

7:35 pm-5:45 pm

1 stop21h 10m

Helena

Sat 5/2

6:22 pm-7:59 am

2 stops14h 37m

$328

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Thu 4/9

6:15 am-5:45 pm

1 stop10h 30m

Helena

Sun 4/12

6:22 pm-11:59 pm

1 stop6h 37m

$333

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Thu 4/9

8:18 pm-5:45 pm

2 stops20h 27m

Helena

Sun 4/12

6:22 pm-11:59 pm

1 stop6h 37m

$337

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Tue 4/28

10:51 am-5:45 pm

1 stop5h 54m

Helena

Sat 5/2

6:22 pm-8:39 am

2 stops15h 17m

$344

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from San Diego to Helena

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Layovers

Can stopping save me money on San Diego to Helena flights?

You could potentially save up to 52% on your flight if you consider stops on a San Diego to Helena flight.

When to book flights from San Diego to Helena

Are you open to changing your travel dates? Check out the ideal times to fly from San Diego to Helena according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap San Diego to Helena (SAN to HLN) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Diego to Helena

Fastest flight time	4h 34m
Direct flights	None

The fastest flight from San Diego to Helena takes 4h 34m

There are no direct flights from San Diego to Helena. There are no popular flight routes from San Diego to Helena.

Search flight deals

How far is San Diego to Helena by plane?
San Diego and Helena are 995.5 mi apart from one another. In terms of flight time, this usually takes a little over 4h 34m.
When did momondo last update prices for flights from San Diego Airport to Helena Airport?
Prices for flights from San Diego Airport to Helena Airport are updated daily.
How many operators does momondo search for flights from San Diego Airport to Helena Airport?
As of March 2026, there is 1 operator available to choose from for flights from San Diego Airport to Helena Airport.
How old do you have to be to fly from San Diego Airport to Helena Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Diego Airport to Helena Airport.
What documentation or ID do you need to fly to Helena Airport?
The required travel and health documents for your Helena Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Helena Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from San Diego to Helena?
Based on momondo bookings for this flight route, the most popular airline on flight routes from San Diego to Helena is Delta (100% of total bookings).

Best airlines flying from San Diego to Helena

Compare and see reviews for airlines that fly from San Diego to Helena with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $219	Free Cancellation	Rating 7.9 8,296 reviews		Search Delta flights

Why use momondo?

Why should I use momondo to find a flight deal from San Diego to Helena?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from San Diego to Helena. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from San Diego to Helena with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Helena from San Diego with this policy.

How can momondo help me find flights from San Diego to Helena?

Once you have performed a search for San Diego to Helena flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from San Diego to Helena right now. Can momondo alert me if prices change?

If you are not ready to book a flight from San Diego to Helena now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Helena and let you know when they change.