Flights Washington DC → San Antonio
As of November 2026, economy flights from Washington DC to San Antonio have a typical range USD 280–358, median USD 304. Full range across all 578 offers: USD 250–539. We analyzed 578 offers from 8 airlines in a single price check.
Preview snapshot — prices change. Search for live results.
Data collected by LetsFG's multi-source price checks — every airline and the major booking sites checked for this route. How we collect data →
Best offers by airline: Washington DC → San Antonio
Based on 578 offers · November 2026. Prices and availability change — run a live search to confirm.
Bag & seat fees: Washington DC → San Antonio
Add-on pricing from the cheapest available offer per airline · November 2026 · USD
| Airline | Carry-on | Checked bag | Seat selection |
|---|---|---|---|
| Frontier Airlines | — | — | — |
| Southwest Airlines | — | — | — |
| Southwest | — | USD 90 | — |
| United | — | — | — |
| Delta | — | — | — |
| American Airlines | — | — | — |
| United | — | USD 100 | — |
Fees are estimates from the prices we checked and may not reflect your specific itinerary, booking class, or payment method. Run a live search for exact pricing.
How much do flights from Washington DC to San Antonio cost?
Based on 578 offers · November 2026
Washington DC to San Antonio flights ranged from USD 250 to USD 539 across 578 offers analyzed in November 2026. The chart below shows how prices distributed across all 578 offers.
These 578 offers (November 2026) span multiple departure dates and booking windows — your travel dates may fall anywhere in this distribution. Only a live search shows where your specific trip lands.
50% of offers priced between USD 298 and USD 328
What hidden fees do Washington DC to San Antonio flights charge?
Ancillary fees — bags, seat selection, and payment surcharges — can add 10–25% to the base fare on Washington DC to San Antonio routes. The breakdown below is based on 578 offers analyzed in November 2026.
| Carrier | Avg fee (USD) | % of base fare |
|---|---|---|
| F9 | 10 | 4% |
| WN | 27 | 7% |
| Southwest | 90 | 32% |
| UA | 10 | 3% |
| DL | 10 | 3% |
| AA | 12 | 4% |
| United | 100 | 32% |
United: base ~USD 209 + fees USD 100 = ~USD 309 total. United Airlines: base ~USD 299 + fees USD 10 = ~USD 309 total.
United's USD 100 ancillary fees narrow the gap with United Airlines's lower-fee model — the USD 90 base difference shrinks to USD 0 after fees. Always compare total cost, not just the advertised base fare.
Estimates based on median total minus average ancillary fee. Actual base fares vary by itinerary.Fee levels vary significantly across carriers on this route — some carriers charge 50%+ above the base fare in ancillary fees.
Run your search to see itemized fees for your itineraryWhich airline is cheapest from Washington DC to San Antonio?
8 airlines flew Washington DC to San Antonio in this dataset. Knowing the airline isn't enough — the typical fare range below shows how far prices swing on each one. Median and range include all fees we recorded.
| Airline | Offers | Typical range (USD) | Median (USD) | Fees (USD) |
|---|---|---|---|---|
 Frontier | 2 | — | 250 | n/a |
 Frontier Airlines | 38 | 270–277 | 275 | 10 (4%) |
 Southwest | 8 | 279–289 | 284 | 90 (32%) |
 Delta Air Lines | 142 | 298–304 | 304 | 10 (3%) |
 United Airlines | 97 | 294–337 | 309 | 10 (3%) |
 United | 8 | — | 309 | 100 (32%) |
 American Airlines | 144 | 304–328 | 318 | 12 (4%) |
 Southwest Airlines | 139 | 279–529 | 358 | 27 (7%) |
Where do the best Washington DC → San Antonio prices come from?
We checked direct airlines, travel agencies, and meta-search for this route. On this route the lowest median came from meta-search sources, but the cheapest channel shifts by route and date — which is exactly why a live search across all of them wins.
We compare every airline and the major booking sites but never disclose which — that's our edge. Prices are the ones we observed and aren't official data from any platform. Run a live search and we bring you the cheapest, wherever it is.
Key facts: Washington DC to San Antonio flights
- Full-service carriers on Washington DC–San Antonio cost 1.1x more than budget airlines (USD 310 vs USD 292 median; overall median USD 304).
- United charges 10.0x more in ancillary fees than DL — USD 100 vs USD 10 avg per booking.
- The same route priced USD 254 apart depending on where it was booked — the lowest median was USD 276. We search every airline and the major booking sites at once so you always see that lowest price.
Frequently asked questions
- How much does a flight from Washington DC to San Antonio cost?
- Based on 578 offers analyzed, Washington DC to San Antonio flights range from USD 250 to USD 539, with a median price of USD 304. Search for your specific dates →
- What hidden fees should I expect on Washington DC to San Antonio flights?
- On average, ancillary fees (bags, seat selection) add USD 17 to the base fare on Washington DC to San Antonio flights. See itemized fees for your itinerary →
- Which airline is cheapest on Washington DC to San Antonio including all fees?
- Frontier has the lowest median fare on Washington DC to San Antonio at USD 250 (median across 2 offers in our snapshot). Check which airline wins on your dates →
- Which booking site has the cheapest Washington DC–San Antonio flights?
- It depends on your dates — no single site is always cheapest. We search every airline and the major booking sites at once (travel agencies and meta-search included) and surface whichever is lowest; the best median in this snapshot was USD 276. Run a live search and we'll find the cheapest for you →
- Why do prices vary so much on Washington DC to San Antonio routes?
- Washington DC to San Antonio has 8 airlines competing, creating a price range from USD 250 to USD 539 across 578 offers. Prices on this route change with booking timing, advance purchase, and ancillary add-ons. Find where your trip lands in the distribution →
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