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Cheap flights from Helena to San Antonio from $205

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Helena to San Antonio departing on 10/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Helena to San Antonio

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
7:15 am - 1:40 pmHLN  Helena-SAT San Antonio
5h 25m1 stop Salt Lake City
Delta Logo
6:01 pm - 10:24 pmSAT  San Antonio-HLN Helena
5h 23m1 stop Salt Lake City
$369Delta
Thu, Sep 17 - Sun, Sep 20
Delta Logo
12:57 pm - 12:13 amHLN  Helena-SAT San Antonio
10h 16m2 stops Salt Lake City Los Angeles
Delta Logo
6:45 am - 12:17 pmSAT  San Antonio-HLN Helena
6h 32m1 stop Salt Lake City
$374Delta
Tue, Sep 15 - Sat, Sep 19
Delta Logo
12:57 pm - 12:13 amHLN  Helena-SAT San Antonio
10h 16m2 stops Salt Lake City Los Angeles
Delta Logo
6:01 pm - 10:24 pmSAT  San Antonio-HLN Helena
5h 23m1 stop Salt Lake City
$414Delta
Thu, Sep 17 - Sun, Sep 20
United Airlines Logo
2:26 pm - 8:52 pmHLN  Helena-SAT San Antonio
5h 26m1 stop Denver Intl
United Airlines Logo
9:10 am - 1:45 pmSAT  San Antonio-HLN Helena
5h 35m1 stop Denver Intl
$429United Airlines
Fri, Sep 18 - Mon, Sep 21
United Airlines Logo
2:23 pm - 8:53 pmHLN  Helena-SAT San Antonio
5h 30m1 stop Denver Intl
United Airlines Logo
4:48 pm - 9:31 pmSAT  San Antonio-HLN Helena
5h 43m1 stop Denver Intl
$429United Airlines
Sat, Nov 14 - Tue, Nov 17
United Airlines Logo
6:15 am - 12:43 pmHLN  Helena-SAT San Antonio
5h 28m1 stop Denver Intl
United Airlines Logo
4:45 pm - 9:30 pmSAT  San Antonio-HLN Helena
5h 45m1 stop Denver Intl
$429United Airlines
Sat, Sep 5 - Sat, Sep 12
Delta Logo
5:40 am - 1:31 pmHLN  Helena-SAT San Antonio
6h 51m1 stop Salt Lake City
Delta Logo
6:35 am - 12:15 pmSAT  San Antonio-HLN Helena
6h 40m1 stop Salt Lake City
$444Delta
Wed, Aug 19 - Sun, Aug 23
Alaska Airlines Logo
5:18 pm - 2:39 pmHLN  Helena-SAT San Antonio
20h 21m2 stops Seattle/Tacoma Intl Los Angeles
Alaska Airlines Logo
12:51 pm - 4:41 pmSAT  San Antonio-HLN Helena
28h 50m2 stops Dallas/Fort Worth Seattle/Tacoma Intl
$450Alaska Airlines
Tue, Sep 22 - Fri, Sep 25
Alaska Airlines Logo
4:08 pm - 6:38 pmHLN  Helena-SAT San Antonio
25h 30m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
7:37 pm - 3:31 pmSAT  San Antonio-HLN Helena
20h 54m1 stop Seattle/Tacoma Intl
$479Alaska Airlines
Tue, Dec 8 - Thu, Dec 10
Alaska Airlines Logo
4:08 pm - 6:38 pmHLN  Helena-SAT San Antonio
25h 30m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
7:37 pm - 3:31 pmSAT  San Antonio-HLN Helena
20h 54m1 stop Seattle/Tacoma Intl
$489Alaska Airlines
Tue, Dec 8 - Thu, Dec 10

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Delta flights from Helena to San Antonio

Our best Delta deals on Helena to San Antonio flight tickets
Delta
Sep 17
HLN7:15 amHelena
5h 25m
1 stop
SAT1:40 pmSan Antonio
Sep 20
SAT6:01 pmSan Antonio
5h 23m
1 stop
HLN10:24 pmHelena
$369
Delta
Sep 15
HLN12:57 pmHelena
10h 16m
2 stops
SAT12:13 amSan Antonio
Sep 19
SAT6:45 amSan Antonio
6h 32m
1 stop
HLN12:17 pmHelena
$374
Delta
Sep 17
HLN12:57 pmHelena
10h 16m
2 stops
SAT12:13 amSan Antonio
Sep 20
SAT6:01 pmSan Antonio
5h 23m
1 stop
HLN10:24 pmHelena
$414

United Airlines flights from Helena to San Antonio

Our best United Airlines deals on Helena to San Antonio flight tickets
United Airlines
Nov 14
HLN2:23 pmHelena
5h 30m
1 stop
SAT8:53 pmSan Antonio
Nov 17
SAT4:48 pmSan Antonio
5h 43m
1 stop
HLN9:31 pmHelena
$429
United Airlines
Nov 14
HLN2:23 pmHelena
5h 30m
1 stop
SAT8:53 pmSan Antonio
Nov 17
SAT11:45 amSan Antonio
10h 46m
2 stops
HLN9:31 pmHelena
$434
United Airlines
Nov 14
HLN6:28 amHelena
11h 42m
2 stops
SAT7:10 pmSan Antonio
Nov 17
SAT11:45 amSan Antonio
10h 46m
2 stops
HLN9:31 pmHelena
$439

momondo Fare Finder

 
Customize your flight search to find flights from Helena to San Antonio that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 7, 2026.
Use the filters below to find and compare flights from Helena to San Antonio that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

HelenaSan Antonio

HLN Helena - SAT San Antonio

HLNSAT

Helena

Thu 9/17

7:15 am-1:40 pm

1 stop5h 25m

San Antonio

Sun 9/20

6:01 pm-10:24 pm

1 stop5h 23m

$369

HelenaSan Antonio

HLN Helena - SAT San Antonio

HLNSAT

Helena

Tue 9/15

12:57 pm-12:13 am

2 stops10h 16m

San Antonio

Sat 9/19

6:45 am-12:17 pm

1 stop6h 32m

$374

HelenaSan Antonio

HLN Helena - SAT San Antonio

HLNSAT

Helena

Thu 9/17

12:57 pm-12:13 am

2 stops10h 16m

San Antonio

Sun 9/20

6:01 pm-10:24 pm

1 stop5h 23m

$414

HelenaSan Antonio

HLN Helena - SAT San Antonio

HLNSAT

Helena

Fri 9/18

2:26 pm-8:52 pm

1 stop5h 26m

San Antonio

Mon 9/21

9:10 am-1:45 pm

1 stop5h 35m

$429

HelenaSan Antonio

HLN Helena - SAT San Antonio

HLNSAT

Helena

Sat 11/14

2:23 pm-8:53 pm

1 stop5h 30m

San Antonio

Tue 11/17

4:48 pm-9:31 pm

1 stop5h 43m

$429

HelenaSan Antonio

HLN Helena - SAT San Antonio

HLNSAT

Helena

Sat 9/5

6:15 am-12:43 pm

1 stop5h 28m

San Antonio

Sat 9/12

4:45 pm-9:30 pm

1 stop5h 45m

$429

HelenaSan Antonio

HLN Helena - SAT San Antonio

HLNSAT

Helena

Wed 8/19

5:40 am-1:31 pm

1 stop6h 51m

San Antonio

Sun 8/23

6:35 am-12:15 pm

1 stop6h 40m

$444

HelenaSan Antonio

HLN Helena - SAT San Antonio

HLNSAT

Helena

Tue 9/22

5:18 pm-2:39 pm

2 stops20h 21m

San Antonio

Fri 9/25

12:51 pm-4:41 pm

2 stops28h 50m

$450

HelenaSan Antonio

HLN Helena - SAT San Antonio

HLNSAT

Helena

Tue 12/8

4:08 pm-6:38 pm

1 stop25h 30m

San Antonio

Thu 12/10

7:37 pm-3:31 pm

1 stop20h 54m

$479

HelenaSan Antonio

HLN Helena - SAT San Antonio

HLNSAT

Helena

Tue 12/8

4:08 pm-6:38 pm

1 stop25h 30m

San Antonio

Thu 12/10

7:37 pm-3:31 pm

1 stop20h 54m

$489

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 resultsSorted by cheapest first
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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

What is the cheapest month to fly to San Antonio?

If you aren’t able to travel during the month of August, then book flights to San Antonio from Helena during July instead. Flights to San Antonio in July, while not as cheap as those in August, still average around $0.

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 12m

Direct flights

None
The fastest flight from Helena to San Antonio takes 5h 12m
There are no direct flights from Helena to San Antonio. There are no popular flight routes from Helena to San Antonio.
Search flight deals

Frequently asked questions about flying from Helena to San Antonio

  • 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 12m, 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?

  • 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?

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
DeltaPriceFrom $288Free CancellationRating
7.8
8,499 reviews
Search Delta flights
United AirlinesPriceFrom $382Free CancellationRating
7.4
10,081 reviews
Search United Airlines flights

Traveling to a place near San Antonio?

Book flights to San Antonio if you plan to visit one of these locations
New Braunfels
Kerrville
Pleasanton
Boerne
Schertz

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.

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