Flights San Francisco → San Diego
As of October 2026, economy flights from San Francisco to San Diego have a typical range USD 239–565, median USD 249. Full range across all 154 offers: USD 149–2313. We analyzed 154 offers from 9 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: San Francisco → San Diego
Based on 154 offers · October 2026. Prices and availability change — run a live search to confirm.
Bag & seat fees: San Francisco → San Diego
Add-on pricing from the cheapest available offer per airline · October 2026 · USD
| Airline | Carry-on | Checked bag | Seat selection |
|---|---|---|---|
| Frontier | — | — | — |
| Southwest Airlines | — | USD 45 | — |
| United | Included | USD 35 | — |
| Southwest | — | USD 45 | — |
| Alaska | — | USD 45 | — |
| Alaska Airlines | — | USD 35 | — |
| Delta | Included | USD 35 | — |
| American Airlines | Included | USD 35 | — |
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 San Francisco to San Diego cost?
Based on 154 offers · October 2026
San Francisco to San Diego flights ranged from USD 149 to USD 2313 across 154 offers analyzed in October 2026. The chart below shows how prices distributed across all 154 offers.
These 154 offers (October 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 240 and USD 330
What hidden fees do San Francisco to San Diego flights charge?
Ancillary fees — bags, seat selection, and payment surcharges — can add 10–25% to the base fare on San Francisco to San Diego routes. The breakdown below is based on 154 offers analyzed in October 2026.
| Carrier | Avg fee (USD) | % of base fare |
|---|---|---|
| F9 | 10 | 6% |
| WN | 14 | 5% |
| UA | 28 | 7% |
| Southwest | 45 | 17% |
| Alaska | 45 | 17% |
| AS | 34 | 8% |
| DL | 35 | 10% |
| AA | 49 | 7% |
American Airlines: base ~USD 200 + fees USD 49 = ~USD 249 total. Southwest Airlines: base ~USD 241 + fees USD 14 = ~USD 255 total.
American Airlines's USD 49 ancillary fees narrow the gap with Southwest Airlines's lower-fee model — the USD 41 base difference shrinks to USD 6 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 San Francisco to San Diego?
9 airlines flew San Francisco to San Diego 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.
Even on the cheapest airline (Frontier Airlines), fares ranged USD 161–198 in this snapshot. Your exact price depends on your dates and how far ahead you book — run a live search to see your number →
| Airline | Offers | Typical range (USD) | Median (USD) | Fees (USD) |
|---|---|---|---|---|
 Frontier Airlines | 5 | 161–198 | 186 | 10 (5%) |
 Frontier | 7 | 186–190 | 186 | n/a |
 United Airlines | 27 | 239–613 | 249 | 28 (11%) |
 American Airlines | 15 | 249–2313 | 249 | 49 (20%) |
 Southwest Airlines | 35 | 239–330 | 255 | 14 (6%) |
 Southwest | 22 | 240–279 | 262 | 45 (17%) |
 Alaska | 10 | 240–279 | 279 | 45 (16%) |
 Delta Air Lines | 11 | 249–529 | 335 | 35 (11%) |
 Alaska Airlines | 22 | 240–648 | 475 | 34 (7%) |
Where do the best San Francisco → San Diego prices come from?
We checked direct airlines, travel agencies, and meta-search for this route. On this route the lowest median came from travel agency 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: San Francisco to San Diego flights
- Full-service carriers on San Francisco–San Diego cost 1.4x more than budget airlines (USD 318 vs USD 222 median; overall median USD 249).
- AA charges 4.9x more in ancillary fees than F9 — USD 49 vs USD 10 avg per booking.
- The same route priced USD 320 apart depending on where it was booked — the lowest median was USD 240. 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 San Francisco to San Diego cost?
- Based on 154 offers analyzed, San Francisco to San Diego flights range from USD 149 to USD 2313, with a median price of USD 249. Search for your specific dates →
- What hidden fees should I expect on San Francisco to San Diego flights?
- On average, ancillary fees (bags, seat selection) add USD 31 to the base fare on San Francisco to San Diego flights. See itemized fees for your itinerary →
- Which airline is cheapest on San Francisco to San Diego including all fees?
- Frontier Airlines has the lowest median fare on San Francisco to San Diego at USD 186 (median across 5 offers in our snapshot). Check which airline wins on your dates →
- Which booking site has the cheapest San Francisco–San Diego 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 240. Run a live search and we'll find the cheapest for you →
- Why do prices vary so much on San Francisco to San Diego routes?
- San Francisco to San Diego has 9 airlines competing, creating a price range from USD 149 to USD 2313 across 154 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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