Cheap flights from California to the United States from $98

In general, September is the cheapest month to fly from California to United States. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $311. If you aren’t able to travel during the month of September, then book flights to United States from California during January instead. Flights to United States in January, while not as cheap as those in September, still average around $311.

According to our data, Wednesday is the cheapest day to fly to United States from California. The lowest ticket price found for a Wednesday departure recently was $414. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $529. These prices are subject to change though, so be sure to set up a Price Alert for flights to United States.

The cheapest time of day to fly to United States is in the afternoon when flights can be purchased for as low as $393. Try not to purchase tickets in the morning because they tend to be around $486. Of course, these prices can vary depending on the time of year and what airport you fly to.

Fly from Ontario to San Francisco for the best California - United States flight prices

You are more likely to see cheaper flights to United States from California when booking weeks ahead of your departure date. In general, you can expect to find flights to United States for around $377 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to United States from California for as low as $317 on momondo.

There are 4 cabin classes available to choose from on California to United States flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Southwest, Alaska Airlines, and Delta are the most popular carriers operating from California to United States

Frontier, United Airlines and Alaska Airlines are the top three most popular airlines that fly to United States from California according to our data. Frontier is the first choice among our users, with 35% of people opting to fly with this airline when traveling to United States. Keep in mind that there are 12 different airlines that fly to United States on a routine basis, so you have a few additional options to choose from.

628 flights are operational daily from California to United States as of July 2026. The most popular departure time for this route is 10:00AM, with 47% of flights per day taking off at noon.

As of July 2026, 4,397 flights take off from California and land in United States each week. The most common flight departure day for this route is Wed, with 17% of weekly flights taking off on this day.