Title: CA $278 Cheap American Airlines fights from Ontario to San Diego - Expedia.ca

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# CA $278 Cheap American Airlines fights from Ontario (ONT) to San Diego (SAN)

[View CA $278 flight on Sat, Feb 21, 2026](https://expedia.ca/Flights-Search?trip=oneway&leg1=from:ONT,to:SAN,departure:21/02/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:277.80&airProductToken=AQpHCiIIwYIBEgQzMDE2GK6bASDvuQEoiuSFAzDd5IUDOE9AAFgBCiEIwYIBEgQzMTA2GO-5ASCSaCiJ54UDMN7nhQM4T0ABWAESCggBEAEYASoCQUEYASIECAEQASgEMAE) 

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## American Airlines flights from Ontario to San Diego (ONT→SAN)

Prices were available within the past 7 days and start at CA $278 for one-way flights and CA $949 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

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One way

Roundtrip

![American Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AA.gif)

Tue, Mar 3 - Wed, Mar 4

ONT

Ontario

SAN

San Diego

CA $949

Roundtrip

found 1 day ago

[](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:ONT,to:SAN,departure:03/03/2026TANYT&leg2=from:SAN,to:ONT,departure:04/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:948.30&airProductToken=AQprCjQIwYIBEgQzMDE2GK6bASDvuQEoxdSGAzCY1YYDOEdAAFgBagZNQUlORkxyCEdWQUlaUlUxCjMIwYIBEgQxOTUwGO-5ASCSaCjR1YYDMKDWhgM4R0ABWAFqBk1BSU5GTHIIR1VBS1pSVTESCggBEAEYASoCQUEYASIECAEQASgCKAMoBDAL)

## Find the cheapest month to fly from Ontario (ONT) to San Diego (SAN)

### August is typically the cheapest month to fly

From CA $228 - CA $903 per traveller.

## Alternative airports near San Diego

Prices were available within the past 7 days. Prices and availability are subject to change.

[](https://www.expedia.ca/Flights-Search?leg1=from:ONT,to:TIJ,departure:12/02/2026TANYT&leg2=from:TIJ,to:ONT,departure:01/03/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE)

TIJ

General Abelardo L. Rodriguez Intl.

Cheapest

26 min

[Flights from CA $926

](https://www.expedia.ca/Flights-Search?leg1=from:ONT,to:TIJ,departure:12/02/2026TANYT&leg2=from:TIJ,to:ONT,departure:01/03/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) 

__Flight from Ontario to San Diego (ONT - SAN) route information__
| Origin airport      | Los Angeles - Ontario Intl. |
| ------------------- | --------------------------- |
| Destination airport | San Diego Intl.             |
| Distance            | 151 km                      |

## Frequently asked questions

### How much is an American Airlines flight from Los Angeles - Ontario Intl. Airport (ONT) to San Diego Intl. Airport (SAN)?

### What is the cheapest month to fly from ONT to SAN with American Airlines?

### Does American Airlines fly nonstop from Los Angeles - Ontario Intl. Airport (ONT) to San Diego Intl. Airport (SAN)?

### What airports does American Airlines fly into in San Diego?

### Can I change or cancel my American Airlines flight from Los Angeles - Ontario Intl. Airport (ONT) to San Diego Intl. Airport (SAN)?

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