Flights Philadelphia → San Antonio
As of November 2026, economy flights from Philadelphia to San Antonio have a typical range USD 416–627, median USD 416. Full range across all 233 offers: USD 316–925. We found 2% of 233 offers from budget carriers (around USD 340) and 98% from full-service carriers (around USD 416).
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: Philadelphia → San Antonio
Based on 233 offers · November 2026. Prices and availability change — run a live search to confirm.
Bag & seat fees: Philadelphia → San Antonio
Add-on pricing from the cheapest available offer per airline · November 2026 · USD
| Airline | Carry-on | Checked bag | Seat selection |
|---|---|---|---|
| American Airlines | Included | USD 35 | — |
| Delta | Included | USD 35 | — |
| United | Included | USD 35 | — |
| Delta | — | USD 90 | — |
| Southwest Airlines | Included | Included | — |
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 Philadelphia to San Antonio cost?
Based on 233 offers · November 2026
Philadelphia to San Antonio flights ranged from USD 316 to USD 925 across 233 offers analyzed in November 2026. Two fare clusters detected: budget fares around 407 and premium fares around 651 The chart below shows how prices distributed across all 233 offers.
These 233 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 416 and USD 416
What hidden fees do Philadelphia to San Antonio flights charge?
Ancillary fees — bags, seat selection, and payment surcharges — can add 10–25% to the base fare on Philadelphia to San Antonio routes. The breakdown below is based on 233 offers analyzed in November 2026.
| Carrier | Avg fee (USD) | % of base fare |
|---|---|---|
| AA | 45 | 10% |
| DL | 37 | 8% |
| UA | 46 | 10% |
| Delta | 90 | 22% |
| WN | 16 | 3% |
Delta: base ~USD 327 + fees USD 90 = ~USD 417 total. Southwest Airlines: base ~USD 474 + fees USD 16 = ~USD 490 total.
Delta's USD 90 ancillary fees narrow the gap with Southwest Airlines's lower-fee model — the USD 147 base difference shrinks to USD 73 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.Delta charges 5.8x more in ancillary fees than WN on this route. Compare total-cost options when booking.
Run your search to see itemized fees for your itineraryWhich airline is cheapest from Philadelphia to San Antonio?
7 airlines flew Philadelphia to San Antonio in this dataset. The route shows a clear split between low-cost and full-service carriers. 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 Airlines | 1 | — | 316 | n/a |
 Frontier | 3 | 331–340 | 340 | n/a |
 American Airlines | 56 | — | 416 | 45 (11%) |
 Delta Air Lines | 93 | 416–627 | 416 | 37 (9%) |
 United Airlines | 55 | 416–420 | 416 | 46 (11%) |
 Delta | 2 | — | 417 | 90 (22%) |
 Southwest Airlines | 23 | 430–681 | 490 | 16 (3%) |
Where do the best Philadelphia → 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: Philadelphia to San Antonio flights
- Full-service carriers on Philadelphia–San Antonio cost 1.1x more than budget airlines (USD 417 vs USD 382 median; overall median USD 416).
- Delta charges 5.8x more in ancillary fees than WN — USD 90 vs USD 16 avg per booking.
- The same route priced USD 311 apart depending on where it was booked — the lowest median was USD 316. 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 Philadelphia to San Antonio cost?
- Based on 233 offers analyzed, Philadelphia to San Antonio flights range from USD 316 to USD 925, with a median price of USD 416. Search for your specific dates →
- What hidden fees should I expect on Philadelphia to San Antonio flights?
- On average, ancillary fees (bags, seat selection) add USD 40 to the base fare on Philadelphia to San Antonio flights. See itemized fees for your itinerary →
- Which airline is cheapest on Philadelphia to San Antonio including all fees?
- Frontier Airlines has the lowest median fare on Philadelphia to San Antonio at USD 316 (median across 1 offers in our snapshot). Check which airline wins on your dates →
- Which booking site has the cheapest Philadelphia–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 316. Run a live search and we'll find the cheapest for you →
- Why do prices vary so much on Philadelphia to San Antonio routes?
- Philadelphia to San Antonio has 7 airlines competing, creating a price range from USD 316 to USD 925 across 233 offers. There are two distinct fare clusters on this route: budget options and premium fares. Find where your trip lands in the distribution →
7 airlines, two price clusters — find which fits your budget
Find flights for my datesNew route — be among the first to track this itinerary
Building with flight data? Power your app or agent with LetsFG
The same multi-source search behind this page — every airline and the major booking sites, deduplicated and ranked — is available to your app or AI agent. Natural-language or structured queries, live prices, zero price bias.
Try the free sandbox — no card →Free sandbox, instant fake results · email for a key · Bearer-token auth · MCP, Python & JS SDKs · letsfg.co/developers