Route guide · 795 miles
Cheap Flights from Denver to San Antonio
DEN → SAT · Nonstop 2h 7m · Live round-trip fares
If San Antonio is next on your list, here's the honest picture on fares from Denver. The trip covers about 795 miles and takes roughly 2h 7m in the air. Prices on this route reward planners: booking 2–4 weeks ahead is the sweet spot, and the lowest fares tend to sell out fast.
Live fares for DEN → SAT are updating. Use the search below for real-time prices.
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Updated daily
Flight time
2h 7m
Nonstop, typical
Distance
795 mi
DEN → SAT
Book ahead
2–4 weeks
Best window, typically
Nonstop airlines
2
United Airlines, Southwest Airlines
Nonstop flights from Denver to San Antonio
The fastest way between the two cities is the nonstop: about 2h 7m for the 795-mile run from DEN to SAT. Those flights are flown by United Airlines, Southwest Airlines. Prices behave best when you book 2–4 weeks out.
Booking insights: Denver → San Antonio
- Distance: 795 miles · nonstop flight time: 2h 7m.
- Fares tend to bottom out when you book about 2–4 weeks ahead — earlier than that rarely helps, later usually hurts.
- Tuesday and Wednesday departures usually undercut Friday and Sunday fares on routes like this one.
- A free fare alert beats daily checking: we watch this route and ping you when prices drop.
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Flying from Denver to San Antonio: what you need to know
The flight
The nonstop from DEN to SAT runs about 2h 7m over 795 miles. It's a comfortable mid-range flight: long enough that seat choice matters a little, short enough that paying up for extras rarely does.
Airlines on this route
United Airlines and Southwest Airlines fly this route nonstop. That matters more than it sounds: the cheapest fare on one carrier is rarely the same product as the cheapest on another. Checked-bag fees, free seat selection and change rules all differ, so compare the full trip cost before you pick a winner. See our airline guides for exactly what each carrier charges — then send an enquiry and we'll confirm the all-in price for your dates.
Leaving from Denver (DEN)
Plan to be at the airport two hours before a domestic departure — ninety minutes can work at smaller airports outside peak times, but security lines are the one variable you can't control. If you're checking a bag, add time rather than cutting it close. Our Denver airport guide covers terminals, parking and ground transport so you can plan the trip to the airport, not just the flight.
Arriving in San Antonio (SAT)
Before you land, know how you're getting from the airport to where you're staying — it's the part of the trip people forget to plan. The San Antonio airport guide lays out your ground options, from transit and shuttles to rideshares and rental cars. Flying back the other way? Check San Antonio to Denver fares — prices on the return direction often move on a different rhythm.
When to book
For a trip of 795 miles, booking 2–4 weeks ahead typically lands you in the sweet spot. Leave it to the final two weeks and prices usually climb as the cheapest seats sell out. If your dates are flexible, midweek departures are where the lower fares hide on most domestic routes.
Good to know before you go
- Morning flights are delayed less often than evening ones — earlier departures have the best on-time record.
- Basic economy fares often exclude checked bags and seat selection. Price the whole trip, not the headline fare.
- Get to the airport two hours before departure; security, not the flight, is the part that runs late.
- If you're traveling with only a carry-on, you can skip the bag-drop line entirely with mobile check-in.
- Download the airline's app before you fly; gate changes and delays show up there first.
Denver to San Antonio flight FAQs
How long is the flight from DEN to SAT?
Nonstop flights from Denver to San Antonio take about 2h 7m and cover roughly 795 miles. One-stop itineraries add 2–4 hours depending on the layover city.
Are there nonstop flights from Denver to San Antonio?
United Airlines, Southwest Airlines typically operate nonstop flights from DEN to SAT. Nonstops are usually cheapest when booked 2–4 weeks ahead of departure.
What is the cheapest month to fly from Denver to San Antonio?
Travelers usually find the gentlest prices away from peak periods — think post-holiday January and the early-fall weeks. Midweek dates inside those windows are cheaper still.
How much are last minute flights from DEN to SAT?
Last-minute flights from DEN to SAT (booked within 7 days of departure) typically cost noticeably more than fares booked 2–4 weeks out. Booking early is the smarter move.
What is a good round-trip deal from Denver to San Antonio?
A good deal is anything at or below the recent fares shown above. Set a free Airfare Deal alert and we'll ping you the moment fares drop.
Which airlines fly from Denver to San Antonio?
You'll mainly see United Airlines, Southwest Airlines on Denver to San Antonio. Checking each against the live fares below is the surest way to find the lowest price for your dates.
How early should I get to Denver airport for this flight?
Plan on two hours before departure for a domestic flight — ninety minutes can work at smaller airports outside peak times. If you're checking a bag, earlier is better; the bag-drop line, not the flight, is what runs late.
Do the cheapest fares on this route include a checked bag?
Usually not. Basic economy fares on most airlines include a carry-on but charge extra for checked bags, and seat selection can cost more too. Add up the real total before comparing — a slightly higher regular fare sometimes works out cheaper. Our team confirms the full breakdown with you before you pay.
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