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 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.

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

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

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 37% 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 travel time from San Diego to Helena?

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

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.

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 May 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.

$225 Cheap Flights from San Diego to Helena in 2026

Q: What is the typical price of a round-trip flight between San Diego and Helena?

Prices are currently low for flights on this route. Typical prices usually range from $467 to $397. The lowest price recently found on this route was $372.

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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.

6:19 pm - 4:06 pm

SAN

HLN

20h 47m

1 stop

4:43 pm - 5:53 pm

HLN

SAN

26h 10m

1 stop

$372Alaska Airlines

Fri, May 29 - Tue, Jun 2

8:04 pm - 4:06 pm

SAN

HLN

19h 02m

1 stop

4:43 pm - 9:35 pm

HLN

SAN

29h 52m

2 stops

$389Alaska Airlines

Fri, May 29 - Tue, Jun 2

6:53 pm - 4:06 pm

SAN

HLN

20h 13m

2 stops

4:43 pm - 8:21 am

HLN

SAN

16h 38m

2 stops

$443Alaska Airlines

Fri, May 29 - Tue, Jun 2

7:18 am - 4:32 pm

SAN

HLN

8h 14m

1 stop

5:09 pm - 6:53 pm

HLN

SAN

26h 44m

2 stops

$447Alaska Airlines

Thu, Aug 13 - Tue, Aug 18

6:15 am - 12:15 pm

SAN

HLN

5h 00m

1 stop

12:55 pm - 6:06 pm

HLN

SAN

6h 11m

1 stop

$449Delta

Thu, Aug 13 - Mon, Aug 17

5:01 pm - 10:41 pm

SAN

HLN

4h 40m

1 stop

1:00 pm - 6:08 pm

HLN

SAN

6h 08m

1 stop

$459Delta

Fri, Jun 19 - Fri, Jun 26

9:47 pm - 4:32 pm

SAN

HLN

17h 45m

2 stops

5:09 pm - 8:04 am

HLN

SAN

15h 55m

2 stops

$465Alaska Airlines

Thu, Aug 13 - Mon, Aug 17

6:15 am - 12:20 pm

SAN

HLN

5h 05m

1 stop

5:35 am - 8:42 am

HLN

SAN

4h 07m

1 stop

$467Delta

Mon, Jun 8 - Sun, Jun 14

10:02 pm - 4:32 pm

SAN

HLN

17h 30m

2 stops

5:09 pm - 11:59 am

HLN

SAN

19h 50m

2 stops

$472Alaska Airlines

Thu, Aug 13 - Tue, Aug 18

8:01 pm - 4:32 pm

SAN

HLN

19h 31m

2 stops

5:09 pm - 11:56 pm

HLN

SAN

7h 47m

1 stop

$477Alaska Airlines

Fri, Jul 3 - Wed, Jul 8

Alaska Airlines flights from San Diego to Helena

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

Alaska Airlines

May 29

SAN6:19 pmSan Diego

20h 47m

1 stop

HLN4:06 pmHelena

Jun 2

HLN4:43 pmHelena

26h 10m

1 stop

SAN5:53 pmSan Diego

$372

Alaska Airlines

May 29

SAN8:04 pmSan Diego

19h 02m

1 stop

HLN4:06 pmHelena

Jun 2

HLN4:43 pmHelena

29h 52m

2 stops

SAN9:35 pmSan Diego

$389

Alaska Airlines

May 29

SAN6:53 pmSan Diego

20h 13m

2 stops

HLN4:06 pmHelena

Jun 2

HLN4:43 pmHelena

16h 38m

2 stops

SAN8:21 amSan Diego

$443

Delta flights from San Diego to Helena

Our best Delta deals on San Diego to Helena flight tickets

Delta

Aug 13

SAN6:15 amSan Diego

5h 00m

1 stop

HLN12:15 pmHelena

Aug 17

HLN12:55 pmHelena

6h 11m

1 stop

SAN6:06 pmSan Diego

$449

Delta

Jun 19

SAN5:01 pmSan Diego

4h 40m

1 stop

HLN10:41 pmHelena

Jun 26

HLN1:00 pmHelena

6h 08m

1 stop

SAN6:08 pmSan Diego

$459

Delta

Jun 8

SAN6:15 amSan Diego

5h 05m

1 stop

HLN12:20 pmHelena

Jun 14

HLN5:35 amHelena

4h 07m

1 stop

SAN8:42 amSan Diego

$467

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Fri 5/29

6:19 pm-4:06 pm

1 stop20h 47m

Helena

Tue 6/2

4:43 pm-5:53 pm

1 stop26h 10m

$372

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Fri 5/29

8:04 pm-4:06 pm

1 stop19h 02m

Helena

Tue 6/2

4:43 pm-9:35 pm

2 stops29h 52m

$389

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Fri 5/29

6:53 pm-4:06 pm

2 stops20h 13m

Helena

Tue 6/2

4:43 pm-8:21 am

2 stops16h 38m

$443

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Thu 8/13

7:18 am-4:32 pm

1 stop8h 14m

Helena

Tue 8/18

5:09 pm-6:53 pm

2 stops26h 44m

$447

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Thu 8/13

6:15 am-12:15 pm

1 stop5h 00m

Helena

Mon 8/17

12:55 pm-6:06 pm

1 stop6h 11m

$449

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Fri 6/19

5:01 pm-10:41 pm

1 stop4h 40m

Helena

Fri 6/26

1:00 pm-6:08 pm

1 stop6h 08m

$459

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Thu 8/13

9:47 pm-4:32 pm

2 stops17h 45m

Helena

Mon 8/17

5:09 pm-8:04 am

2 stops15h 55m

$465

Quickest round-trip

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Mon 6/8

6:15 am-12:20 pm

1 stop5h 05m

Helena

Sun 6/14

5:35 am-8:42 am

1 stop4h 07m

$467

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Thu 8/13

10:02 pm-4:32 pm

2 stops17h 30m

Helena

Tue 8/18

5:09 pm-11:59 am

2 stops19h 50m

$472

San DiegoHelena

SAN - HLN

SANHLN

San Diego

Fri 7/3

8:01 pm-4:32 pm

2 stops19h 31m

Helena

Wed 7/8

5:09 pm-11:56 pm

1 stop7h 47m

$477

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

What is the typical price of a round-trip flight between San Diego and Helena?

What is the cheapest month to fly to Helena?

If you aren’t able to travel to Helena during the month of April, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $0.

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 32m
Direct flights	None

The fastest flight from San Diego to Helena takes 4h 32m

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

Search flight deals

Frequently asked questions about flying from San Diego to Helena

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 32m.
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 May 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 8,455 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.