£90 Find Cheap Flights from Chicago to San Diego – Compare and Save

The cheapest month for flights from Chicago O'Hare Intl Airport to San Diego is February, where tickets cost £187 (return) on average. On the other hand, the most expensive months are July and June, where the average cost of round-trip tickets is £273 and £267 respectively.

To get a below average price on the flight from Chicago O'Hare Intl Airport to San Diego, you should book around 4 weeks before departure, which saves you about 45% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 10 weeks before departure.

In the past 5 days, the cheapest return tickets from Chicago to San Diego were found on United Airlines (£180) and Alaska Airlines (£189).

American Airlines connects Chicago to San Diego with 35 flights per week. United Airlines also offers 35 flights per week, while Alaska Airlines follows with 18 flights per week.

There is only one cabin class option available for the route, which is Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

Each day, there are between 12 and 13 direct flights that take off from Chicago O'Hare Intl Airport and land in San Diego, with an average flight time of 4h 28m. The most common departure time is 20:00 and most flights take off in the evening. Each week, there are 88 flights. The most frequent day of departure is Monday, when 15% of all weekly flights depart. The fewest flights depart on a Tuesday.