Cheap flights from California to St. Louis from $43
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from California to St. Louis departing on 9/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Spirit Airlines flights from California to St. Louis
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Frontier flights from California to St. Louis
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How to get the cheapest flight ticket from California to St. Louis
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to St. Louis?
In general, August is the cheapest month to fly from California to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $342. The month of September is another great option to travel to St. Louis, with average flight prices from California averaging around $343.
What is the cheapest day to depart on your flight to St. Louis?
The cheapest day to depart on your flight to St. Louis is on a Tuesday when prices can be found for as low as $383. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $447. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.
What is the cheapest time of day to depart on your flight to St. Louis?
Flying to St. Louis from California in the morning is the least expensive time of day to depart. momondo users have found prices as low as $417 when looking at flights departing in the morning. In the evening is when there is more demand to fly to St. Louis, so prices are often more expensive at around $425 per ticket.
What is the cheapest California to Lambert-St Louis flight route?
Fly from San Diego to Lambert-St Louis for the best California - Lambert-St Louis flight prices
How far in advance should I book a flight to St. Louis?
You are more likely to see cheaper flights to St. Louis from California when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $400 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from California for as low as $300 on momondo.
What cabin class options are available on California to Lambert-St Louis flights?
There are 4 cabin classes available to choose from on California to Lambert-St Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from California to Lambert-St Louis?
Frontier and Spirit Airlines are the most popular carriers operating from California to Lambert-St Louis
What airlines fly to St. Louis?
Southwest, American Airlines and United Airlines are the top three most popular airlines that fly to St. Louis from California according to our data. Southwest is the first choice among our users, with 34% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 7 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.
How many flights depart from California to St. Louis on average per day?
22 flights are operational daily from California to St. Louis as of July 2025. The most popular departure time for this route is 5:00PM, with 45% of flights per day taking off in the afternoon.
How many flights depart from California to St. Louis on average per week?
The number of flights available between California and St. Louis is 155 per week as of July 2025. The most frequent departure day is Mon, with 24% of weekly flights leaving on this day.
Cheap California to St. Louis flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from California to St. Louis
When did momondo last update prices for flights from California to Lambert-St Louis Airport?
Prices for flights from California to Lambert-St Louis Airport are refreshed on a daily basis.
How many operators does momondo search for flights from California to Lambert-St Louis Airport?
As of July 2025, there are 7 operators available to choose from for flights from California to Lambert-St Louis Airport.
How old do you have to be to fly from California to Lambert-St Louis Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from California to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from California to St. Louis?
Based on momondo bookings for flights between California and St. Louis, the leading plane model is Boeing 737-700 Passenger/BBJ1 (winglets), making up 18.57% of the total bookings. Other popular models include Airbus A319 with 14.22%, Boeing 737-800 Passenger/BBJ2 (winglets) with 12.00%, and Embraer 175 with 11.23%.
Best airlines flying from California to St. Louis
Compare and see reviews for airlines that fly from California to St. Louis with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $99 | Free Cancellation | Rating 6.3 8,103 reviews | |||
| PriceFrom $108 | Free Cancellation | Rating 5.9 3,291 reviews | |||
| PriceFrom $166 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $184 | Free Cancellation | Rating 8.0 7,975 reviews | |||
| PriceFrom $246 | Free Cancellation | Rating 7.4 8,858 reviews | |||
| PriceFrom $299 | Free Cancellation | Rating 8.0 4,272 reviews | |||
| PriceFrom $327 | Free Cancellation | Rating 8.0 10,000 reviews |
Traveling to a place near St. Louis?
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Why should I use momondo to find a flight deal from California to St. Louis?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from California to St. Louis. momondo saves you time and could save you money on your trip.
Can I find flights from California to St. Louis with flexible booking policies on momondo?
Flights from California to St. Louis with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from California to St. Louis?
Once all potential California to St. Louis flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from California to St. Louis right now. Can momondo alert me if prices change?
If you are simply researching potential flights to St. Louis, momondo offers a useful price alert feature which will track prices for flights to St. Louis from California and alert you when they change.