What airlines fly to San Antonio?

United Airlines, Delta and Southwest are the top three most popular airlines that fly to San Antonio from Helena according to our data. United Airlines is the first choice among our users, with 45% of people opting to fly with this airline when traveling to San Antonio. Keep in mind that there are 4 different airlines that fly to San Antonio on a routine basis, so you have a few additional options to choose from.

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

Alaska Airlines and United Airlines are the most popular carriers operating from Helena to San Antonio

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

Prices for flights from Helena Airport to San Antonio Airport were last updated today.

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

The number of operators available for flights from Helena Airport to San Antonio Airport is 1 as of December 2025.

How old do you have to be to fly from Helena Airport to San Antonio 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 Helena Airport to San Antonio Airport.

What documentation or ID do you need to fly to San Antonio Airport?

The necessary travel and health documents for your San Antonio Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$331 Cheap Flights from Helena to San Antonio in 2025/26

1 adult

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Find the cheapest flights from Helena to San Antonio

Round-trip

One-way

Cheap round-trip flights

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6:48 pm - 5:45 pm

HLN

SAT

21h 57m1 stop

6:46 pm - 6:11 pm

SAT

HLN

24h 25m1 stop

$372Alaska Airlines

sam., janv. 24 - mer., janv. 28

6:15 am - 1:09 pm

HLN

SAT

5h 54m1 stop

12:30 pm - 9:26 pm

SAT

HLN

9h 56m2 stops

$468United Airlines

sam., janv. 24 - mer., janv. 28

6:15 am - 5:33 pm

HLN

SAT

10h 18m2 stops

2:15 pm - 9:26 pm

SAT

HLN

8h 11m2 stops

$473United Airlines

sam., janv. 24 - mer., janv. 28

6:32 pm - 5:05 am

HLN

SAT

9h 33m1 stop

6:46 pm - 6:11 pm

SAT

HLN

24h 25m1 stop

$648Alaska Airlines

ven., janv. 2 - jeu., janv. 8

6:32 pm - 5:05 am

HLN

SAT

9h 33m1 stop

6:00 am - 6:11 pm

SAT

HLN

13h 11m2 stops

$754Alaska Airlines

ven., janv. 2 - jeu., janv. 8

2:26 pm - 8:50 am

HLN

SAT

17h 24m3 stops

8:30 am - 1:41 pm

SAT

HLN

6h 11m1 stop

$821United Airlines

ven., janv. 2 - jeu., janv. 8

2:26 pm - 8:50 am

HLN

SAT

17h 24m3 stops

11:43 am - 9:26 pm

SAT

HLN

10h 43m2 stops

$827United Airlines

ven., janv. 2 - jeu., janv. 8

Alaska Airlines flights from Helena to San Antonio

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

Alaska Airlines

Jan 24

HLN6:48 pmHelena

21h 57m

1 stop

SAT5:45 pmSan Antonio

Jan 28

SAT6:46 pmSan Antonio

24h 25m

1 stop

HLN6:11 pmHelena

$372

Find similar

Alaska Airlines

Jan 2

HLN6:32 pmHelena

9h 33m

1 stop

SAT5:05 amSan Antonio

Jan 8

SAT6:46 pmSan Antonio

24h 25m

1 stop

HLN6:11 pmHelena

$648

Find similar

Alaska Airlines

Jan 2

HLN6:32 pmHelena

9h 33m

1 stop

SAT5:05 amSan Antonio

Jan 8

SAT6:00 amSan Antonio

13h 11m

2 stops

HLN6:11 pmHelena

$754

Find similar

United Airlines flights from Helena to San Antonio

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

United Airlines

Jan 24

HLN6:15 amHelena

5h 54m

1 stop

SAT1:09 pmSan Antonio

Jan 28

SAT12:30 pmSan Antonio

9h 56m

2 stops

HLN9:26 pmHelena

$468

Find similar

United Airlines

Jan 24

HLN6:15 amHelena

10h 18m

2 stops

SAT5:33 pmSan Antonio

Jan 28

SAT2:15 pmSan Antonio

8h 11m

2 stops

HLN9:26 pmHelena

$473

Find similar

United Airlines

Jan 2

HLN2:26 pmHelena

17h 24m

3 stops

SAT8:50 amSan Antonio

Jan 8

SAT8:30 amSan Antonio

6h 11m

1 stop

HLN1:41 pmHelena

$821

Find similar

Fly from

Fly to

Route

Depart

Return

Price

HelenaSan Antonio

HLN - SAT

HLNSAT

Helena

sam. 1/24

6:48 pm-5:45 pm

1 stop21h 57m

San Antonio

mer. 1/28

6:46 pm-6:11 pm

1 stop24h 25m

$372

HelenaSan Antonio

HLN - SAT

HLNSAT

Helena

sam. 1/24

6:15 am-1:09 pm

1 stop5h 54m

San Antonio

mer. 1/28

12:30 pm-9:26 pm

2 stops9h 56m

$468

HelenaSan Antonio

HLN - SAT

HLNSAT

Helena

sam. 1/24

6:15 am-5:33 pm

2 stops10h 18m

San Antonio

mer. 1/28

2:15 pm-9:26 pm

2 stops8h 11m

$473

HelenaSan Antonio

HLN - SAT

HLNSAT

Helena

ven. 1/2

6:32 pm-5:05 am

1 stop9h 33m

San Antonio

jeu. 1/8

6:46 pm-6:11 pm

1 stop24h 25m

$648

HelenaSan Antonio

HLN - SAT

HLNSAT

Helena

ven. 1/2

6:32 pm-5:05 am

1 stop9h 33m

San Antonio

jeu. 1/8

6:00 am-6:11 pm

2 stops13h 11m

$754

HelenaSan Antonio

HLN - SAT

HLNSAT

Helena

ven. 1/2

2:26 pm-8:50 am

3 stops17h 24m

San Antonio

jeu. 1/8

8:30 am-1:41 pm

1 stop6h 11m

$821

HelenaSan Antonio

HLN - SAT

HLNSAT

Helena

ven. 1/2

2:26 pm-8:50 am

3 stops17h 24m

San Antonio

jeu. 1/8

11:43 am-9:26 pm

2 stops10h 43m

$827

HelenaSan Antonio

HLN - SAT

HLNSAT

Helena

sam. 1/3

6:32 pm-5:05 am

1 stop9h 33m

$379

HelenaSan Antonio

HLN - SAT

HLNSAT

Helena

sam. 1/3

6:10 am-5:46 pm

2 stops10h 36m

$752

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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

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

What is the cheapest day to depart on your flight to San Antonio?

The cheapest day to depart on your flight to San Antonio is on a Thursday when prices can be found for as low as $456. This is often the case because there is less demand to fly during this day of the week. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to San Antonio on Sunday is $810.

What is the cheapest time of day to depart on your flight to San Antonio?

According to our data, the cheapest time of day to fly to San Antonio is at noon. momondo users have found flights departing from Helena to San Antonio at noon for as low as $568. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to San Antonio are more costly in the morning, with an average ticket price of $574. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

When to book flights from Helena to San Antonio

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

Estimated round-trip price

Cheap Helena to San Antonio (HLN to SAT) flight deals and tips

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

Fastest flight time	5h 54m
Direct flights	None

The fastest flight from Helena to San Antonio takes 5h 54m

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

Search flight deals

How far is Helena to San Antonio by plane?
The distance between Helena and San Antonio is about 1391.2 mi. Flights usually cover this in 5h 54m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Helena Airport to San Antonio Airport?
Prices for flights from Helena Airport to San Antonio Airport were last updated today.
How many operators does momondo search for flights from Helena Airport to San Antonio Airport?
The number of operators available for flights from Helena Airport to San Antonio Airport is 1 as of December 2025.
How old do you have to be to fly from Helena Airport to San Antonio 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 Helena Airport to San Antonio Airport.
What documentation or ID do you need to fly to San Antonio Airport?
The necessary travel and health documents for your San Antonio Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Helena to San Antonio?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Helena to San Antonio is United Airlines (100% of total bookings).

Best airlines flying from Helena to San Antonio

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

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $340	Free Cancellation	Rating 7.4 9,091 reviews		Search United Airlines flights

New Braunfels

Kerrville

Boerne

Schertz

Pleasanton

Why use momondo?

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

It is quick and easy to find Helena to San Antonio flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to San Antonio that suits you.

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

Yes. momondo allows you to filter the results for Helena to San Antonio flights to just show those with flexible booking policies.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to San Antonio from Helena.

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

Yes. momondo can track prices for Helena to San Antonio flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.