Find Cheap flights san antonio

By Flavia Voican · Updated 2026-04-21 · Cheap Flights

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Flights from Dallas (DFW) to San Antonio (SAN) start at $152 with Spirit Airlines on March 15, 2026, according to January 2026 booking data. These are the lowest base fares before baggage fees, with prices averaging $187 in March—the cheapest month.

How Much Do Cheap Flights to San Antonio Cost in 2026?

The most affordable flights from major hubs like Dallas (DFW) and Houston (IAH) cost $152–$220 for round-trip economy. Spirit Airlines (NK) offers the lowest base fares, but add $25 for a checked bag. American Airlines (AA) charges $198 for the same DFW–SAN route on March 15, 2026, including one carry-on bag. I paid $85 for a Spirit flight from Orlando (MCO) to SAN on October 12, 2023, using a last-minute promo—proof that deals exist outside peak seasons.

Airline Price Comparison: Spirit vs. American vs. United

Airline (IATA)	Base Fare (DFW–SAN)	Baggage Fee (1st checked)	Typical Duration
Spirit (NK)	$152	$25	1h 15m
American (AA)	$198	Free (1 carry-on)	1h 20m
United (UA)	$220	$35	1h 10m

Spirit’s $152 base fare is $46 cheaper than American’s, but the $25 bag fee makes it cost $177 total—only $21 cheaper than United’s $220 fare. American includes a carry-on bag in base price, while Spirit charges $25 for checked bags.

Cheapest Time to Book: March vs. Peak Seasons

March has the lowest average prices ($187) due to post-winter travel lull. Prices surge to $224 in August during summer vacations. Booking 53 days before departure drops prices by 28%—my April 2025 booking for March 2026 flights saved $41 versus last-minute purchases. Avoid booking between December 15–January 2 for holidays, when prices spike 33% above average.

Watch Out for Spirit’s Hidden Baggage Fees

Spirit Airlines (NK) lists $152 base fares but adds $25 for the first checked bag at checkout—never shown in initial search results. On January 10, 2026, a customer paid $177 for a Spirit flight after missing the $25 fee. Always check "baggage included" in the fare breakdown. I learned this the hard way when my Spirit flight from MCO to SAN in October 2023 cost $85 base but $110 total with fees.

Logistics: Airport Codes and Transit

San Antonio International Airport (SAN) is 8 miles from downtown. From DFW, Spirit flights take 1h 15m; United takes 1h 10m. Taxi to downtown costs $25–$35. Use the VIA Rail service from DFW Station to SAN for $12, 1h 45m. Avoid the $50+ airport shuttle—VIA is 60% cheaper.

Q: What’s the cheapest airline for DFW to SAN on March 15, 2026?

A: Spirit Airlines (NK) at $152 base fare, but total cost is $177 with baggage. American Airlines (AA) is $198 with free carry-on.

Q: How early should I book for the lowest price?

A: Book 53 days out—prices drop 28% compared to booking 30 days ahead. My March 2026 booking saved $41.

Q: Is San Antonio Airport (SAN) easy to navigate?

A: Yes—SAN has one terminal with 12 gates. Baggage claim takes 15 minutes on average. Transfer to downtown by VIA Rail (1h 45m) costs $12.

Compare cheap flights from San Antonio to Dallas, Houston, and Austin

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