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Flights from San Antonio to Denver

Cheapest airlines flights from San Antonio to Denver

You can choose from 1 airlines that fly from San Antonio to Denver, including Frontier Airlines, Frontier Airlines has lowest fares on this route.
Frontier Airlines logo Frontier Airlines
Airlines are determined based on actual purchased flight tickets from San Antonio to Denver according to previous 12 months data from Trip.com.

Search for direct flights from San Antonio to Denver in the next 3 months. Based on Trip.com's latest 7-day flight data, one-way direct flights start at US$21, and round-trip direct flights start at US$68.

      • Cheapest nonstop
        SAT 16:49
        2h 26m
        Nonstop
        DEN 18:15
        San Antonio - Denver | Wed, Apr 15 | Frontier Airlines
        DEN 12:35
        2h 18m
        Nonstop
        SAT 15:53
        Denver - San Antonio | Wed, Apr 22 | Frontier Airlines
        US$68 US$100
        32% off
        32% off
        US$100 US$68
      • SAT 16:04
        2h 26m
        Nonstop
        DEN 17:30
        San Antonio - Denver | Sat, Apr 25 | Frontier Airlines
        DEN 11:50
        2h 19m
        Nonstop
        SAT 15:09
        Denver - San Antonio | Sat, May 2 | Frontier Airlines
        US$68 US$100
        32% off
        32% off
        US$100 US$68
      • SAT 16:04
        2h 26m
        Nonstop
        DEN 17:30
        San Antonio - Denver | Tue, Apr 21 | Frontier Airlines
        DEN 10:57
        2h 18m
        Nonstop
        SAT 14:15
        Denver - San Antonio | Fri, Apr 24 | Frontier Airlines
        US$72 US$100
        28% off
        28% off
        US$100 US$72
      • SAT 16:49
        2h 26m
        Nonstop
        DEN 18:15
        San Antonio - Denver | Wed, Apr 22 | Frontier Airlines
        DEN 11:50
        2h 19m
        Nonstop
        SAT 15:09
        Denver - San Antonio | Sat, Apr 25 | Frontier Airlines
        US$76
        24% off
        US$100 US$76
      • SAT 06:45
        2h 23m
        Nonstop
        DEN 08:08
        San Antonio - Denver | Mon, Mar 30 | Frontier Airlines
        DEN 21:00
        2h 17m
        Nonstop
        SAT 00:17
        Denver - San Antonio | Tue, Mar 31 | Frontier Airlines
        US$77
        23% off
        US$100 US$77
      • SAT 06:45
        2h 23m
        Nonstop
        DEN 08:08
        San Antonio - Denver | Thu, Apr 2 | Frontier Airlines
        DEN 21:00
        2h 19m
        Nonstop
        SAT 00:19
        Denver - San Antonio | Sun, Apr 5 | Frontier Airlines
        US$87
        13% off
        US$100 US$87
      • SAT 15:14
        2h 26m
        Nonstop
        DEN 16:40
        San Antonio - Denver | Tue, Apr 14 | Frontier Airlines
        DEN 11:00
        2h 19m
        Nonstop
        SAT 14:19
        Denver - San Antonio | Wed, Apr 15 | Frontier Airlines
        US$88
        12% off
        US$100 US$88
      • SAT 15:00
        2h 26m
        Nonstop
        DEN 16:26
        San Antonio - Denver | Thu, Apr 16 | Frontier Airlines
        DEN 10:57
        2h 18m
        Nonstop
        SAT 14:15
        Denver - San Antonio | Mon, Apr 20 | Frontier Airlines
        US$89
        11% off
        US$100 US$89
      • SAT 15:14
        2h 26m
        Nonstop
        DEN 16:40
        San Antonio - Denver | Tue, May 5 | Frontier Airlines
        DEN 11:00
        2h 19m
        Nonstop
        SAT 14:19
        Denver - San Antonio | Sun, May 10 | Frontier Airlines
        US$89
        11% off
        US$100 US$89
      • SAT 16:49
        2h 26m
        Nonstop
        DEN 18:15
        San Antonio - Denver | Wed, Apr 29 | Frontier Airlines
        DEN 10:57
        2h 18m
        Nonstop
        SAT 14:15
        Denver - San Antonio | Mon, May 4 | Frontier Airlines
        US$90
        10% off
        US$100 US$90
      • SAT 13:00
        17h 25m
        1 stop
        DEN Invalid Date
        San Antonio - Denver | Mon, Mar 16 | Normal Airline
        DEN 15:00
        6h
        Nonstop
        SAT 16:00
        Denver - San Antonio | Wed, Mar 18 | Normal Airline
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      • Cheapest nonstop
        SAT 16:04
        2h 26m
        Nonstop
        DEN 17:30
        San Antonio - Denver | Tue, Apr 21 | Frontier Airlines
        US$21 US$80
        74% off
        74% off
        US$80 US$21
      • SAT 15:14
        2h 26m
        Nonstop
        DEN 16:40
        San Antonio - Denver | Tue, Apr 14 | Frontier Airlines
        US$29 US$80
        64% off
        64% off
        US$80 US$29
      • SAT 16:49
        2h 26m
        Nonstop
        DEN 18:15
        San Antonio - Denver | Wed, Apr 15 | Frontier Airlines
        US$30 US$80
        63% off
        63% off
        US$80 US$30
      • SAT 15:14
        2h 26m
        Nonstop
        DEN 16:40
        San Antonio - Denver | Tue, May 12 | Frontier Airlines
        US$30
        63% off
        US$80 US$30
      • SAT 07:45
        2h 22m
        Nonstop
        DEN 09:07
        San Antonio - Denver | Wed, Apr 1 | Frontier Airlines
        US$31
        61% off
        US$80 US$31
      • SAT 15:14
        2h 26m
        Nonstop
        DEN 16:40
        San Antonio - Denver | Tue, May 5 | Frontier Airlines
        US$35
        56% off
        US$80 US$35
      • SAT 06:45
        2h 23m
        Nonstop
        DEN 08:08
        San Antonio - Denver | Thu, Apr 9 | Frontier Airlines
        US$36
        55% off
        US$80 US$36
      • SAT 06:45
        2h 23m
        Nonstop
        DEN 08:08
        San Antonio - Denver | Thu, Apr 2 | Frontier Airlines
        US$41
        49% off
        US$80 US$41
      • SAT 06:45
        2h 23m
        Nonstop
        DEN 08:08
        San Antonio - Denver | Thu, Mar 26 | Frontier Airlines
        US$62
        23% off
        US$80 US$62
      • SAT 06:45
        2h 23m
        Nonstop
        DEN 08:08
        San Antonio - Denver | Sun, Apr 12 | Frontier Airlines
        US$72
        10% off
        US$80 US$72
      • SAT 13:00
        17h 25m
        1 stop
        DEN Invalid Date
        San Antonio - Denver | Mon, Mar 16 | Normal Airline
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        Find more flights

Displayed flight fares from San Antonio to Denver are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

San Antonio to Denver Flight Details

The distance between San Antonio and Denver is about 1,280.06 km. The average flying time from San Antonio to Denver is around 2 hours 26 minutes. Based on Trip.com's latest data, travel demand is highest in July. The off-season for travel is November.

Cheapest one-way flight priceUS$21
Cheapest return ticket priceUS$68
Cheapest monthNovember
Peak season for travelJuly
Flight distance1,280.06 km
Average flight time2 hours 26 minutes
Popular airlineFrontier Airlines
Flight statistics for the San Antonio–Denver route are based on aggregated booking data from Trip.com over the past 12 months.

Trip.com Price Insights on Flights from San Antonio to Denver

Which month has the cheapest one-way flights from San Antonio to Denver?

The average price of one-way flights from San Antonio to Denver purchased by Trip.com users by month over the past 12 months.

Based on Trip.com’s data, the cheapest month for flights from San Antonio to Denver is March, with an average price of US$33; while the month with the highest flight price is usually September, with an average price of up to US$381.

US$381
US$207
US$33
0
  • US$33
    Mar
  • US$136
    Apr
  • US$109
    May
  • US$197
    Jun
  • US$146
    Jul
  • US$144
    Aug
  • US$381
    Sep
  • US$119
    Oct
  • US$197
    Nov
  • US$86
    Dec
  • US$82
    Jan
  • US$134
    Feb

What is the cheapest day of the week to fly from San Antonio to Denver?

Average weekly flight prices from San Antonio to Denver by travel date (Based on Trip.com’s past 12 months of data)

Based on Trip.com’s past 12 months of flight data, the cheapest day to fly from San Antonio to Denver is Tuesday, with average prices lower than on other days. Avoid Wednesday, as prices are usually highest then.

US$221
US$130
US$38
0
  • US$181
    Mon
  • US$38
    Tue
  • US$221
    Wed
  • US$86
    Thu
  • US$135
    Fri
  • US$152
    Sat
  • US$175
    Sun

What is the cheapest day to fly from San Antonio to Denver during Easter Day?

Based on Trip.com's data over the past 3 days, these are the lowest one-way flight prices from San Antonio to Denver during Easter Day.

During the Easter Day period, the cheapest flights from San Antonio to Denver were available on Apr 14 with the lowest price being US$36.

US$127
US$82
US$36
0
    Cheapest
  • US$47
    Apr 8
  • US$94
    Apr 9
  • US$74
    Apr 10
  • US$85
    Apr 11
  • US$75
    Apr 12
  • US$127
    Apr 13
  • US$36
    Apr 14

Frequently Asked Questions

  • What are the cheapest flights from San Antonio to Denver (SAT-DEN)?

    Based on Trip.com data, Frontier Airlines offers one-way fares as low as US$21 on Cheapest nonstop routes (e.g. SAT to DEN on Tue, Apr 21), while Frontier Airlines offers Cheapest nonstop round-trips from US$68 departing on Wed, Apr 15 and returning on Wed, Apr 22.
  • At the moment, you can catch a nonstop flight from San Antonio to Denver with the following airlines, including: Frontier Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.
  • It takes about 2 hours 26 minutes to fly from San Antonio to Denver.
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from San Antonio to Denver is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • Based on Trip.com data in the past 4 weeks, there is 35 flight per week flying from San Antonio to Denver. You can check the weekly schedule for popular airlines on this route below: Frontier Airlines: -/-/-/-/-/-/S -- F92355 (07:02)
  • To find best deals on flights from San Antonio to Denver, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Tue, Apr 21, with one-way flights priced at just US$21.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Frontier Airlines.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Denver travel is around July.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from San Antonio to Denver is November, when demand for travel is lower.
  • After crunching the numbers on our March flight calendar, it's currently cheapest to fly from San Antonio to Denver on March 30, 2026 with Frontier Airlines, with prices starting at US$77.
  • You can land at any one of the following hubs in Denver, with San Antonio International Airport to Denver International Airport (SAT-DEN) is by far the most common option on this route: Rocky Mountain Metropolitan Airport (BJC) Denver International Airport (DEN).
  • The time difference between Denver and San Antonio is 1h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

Trip.com Airline Insights on Flights from San Antonio to Denver

Which airline offers the cheapest direct flights from San Antonio to Denver?

Data is based on the average price of all nonstop flights from San Antonio to Denver on Trip.com over the past 12 months.

Based on Trip.com’s data from the past 12 months, Frontier Airlines provides the lowest-priced direct flights from San Antonio to Denver, with fares starting at US$113.

US$73
US$113
US$153
US$193
US$233
Frontier Airlines
US$113
Frontier Airlines
American Airlines
US$221
American Airlines
United Airlines
US$233
United Airlines

Which airline operates the most flights from San Antonio to Denver?

Total flights from San Antonio to Denver across all airlines. (Based on Trip.com data from the past month)

Based on Trip.com’s data from the past month, United Airlines/Air Canada operates the most frequent flights from San Antonio to Denver, with 24 flights per week.

0
7
16
24
United Airlines
24
United Airlines
Air Canada
24
Air Canada
Volaris
15
Volaris
Frontier Airlines
8
Frontier Airlines
Lufthansa
7
Lufthansa

How many flights fly from San Antonio to Denver daily?

The data is based on the flight numbers for each day of the week from San Antonio to Denver within the Trip.com database over the past month.

Based on the past month's historical data from Trip.com, the number of flights from San Antonio to Denver is the highest on Friday/Saturday and the lowest on Wednesday.

59
53
46
40
Highest
48
Mon
47
Tue
46
Wed
48
Thu
59
Fri
59
Sat
56
Sun

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Note: Prices shown on this page are the estimated lowest prices found in the last 24 hours and include all taxes and fees.

Book with no extra fees

Prices displayed on this page are all-inclusive (incl. taxes, fuel surcharges, Civil Aviation Development Fund, etc.), and all fees are clearly shown before you pay. Charges for checked baggage, onboard meals, Wi‑Fi, and other optional services are also included where applicable in the flight cards.

Real-time pricing updates

Prices, availability, and travel details on this page have been updated within the last 24 hours, and for many routes are refreshed in real time. The more popular the route, the more accurate and up-to-date the data.

Change & Cancellation Policy

Trip.com shows the change and cancellation rules for each ticket during the booking process, including all related fees and conditions. Please refer to the following scenarios:
Voluntary cancellation/change:
To request a change or cancellation, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and flight segment, and submit your request. Please note that additional charges may apply based on the airline’s fare rules.
Cancellation/change due to a flight schedule change:
If your flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For full details of change and cancellation policies, please refer to the customer support pages.