Cheap Flights from St. Louis (STL) to San Francisco (SFO)

You can find one-way and return flights from STL to SFO with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when STL to SFO ticket fares go up or down.

If you're looking for the cheapest time to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to San Francisco, CA (SFO-San Francisco Intl.), September is typically your best bet. You can expect average return fares to be around AU$563 during this month. Other budget-friendly months for this route include August and October.

There are 2 airlines offering direct flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to San Francisco, CA (SFO-San Francisco Intl.). Here are the carriers:
* United operates 10 direct flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to San Francisco, CA (SFO-San Francisco Intl.) every week.
* Southwest Airlines operates 8 direct flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to San Francisco, CA (SFO-San Francisco Intl.) every week.

To find a cheap flight from St. Louis, MO (STL) to San Francisco, CA (SFO), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.

The best airline to fly with from St. Louis, MO (STL-Lambert-St. Louis Intl.) to San Francisco, CA (SFO-San Francisco Intl.) will differ from traveler to traveler. If you like to fly early, Southwest Airlines offers early morning flights. If price is the most important factor, Southwest Airlines typically offers the lowest fares. Southwest Airlines offers the most daily flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to San Francisco, CA (SFO-San Francisco Intl.), which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.

The cheapest months to fly from St. Louis, MO (STL-Lambert-St. Louis Intl.) to San Francisco, CA (SFO-San Francisco Intl.) are typically September and October, with return flights averaging around AU$563. These months can be a great time to visit San Francisco as the summer crowds start to thin out, and you might find pleasant weather, offering a good balance of value and experience.

You'll find approximately 3 nonstop flights per day from St. Louis, MO (STL-Lambert-St. Louis Intl.) to San Francisco, CA (SFO-San Francisco Intl.). For even more choices, look at flights that include layovers, as there are around 96 connecting flights per day. Some common connection points include O'Hare Intl. (ORD), Seattle - Tacoma Intl. (SEA), and Denver Intl. (DEN).

The earliest flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to San Francisco, CA (SFO-San Francisco Intl.) typically departs around 5:00 AM. This service is operated by American Airlines. Please note that this is a seasonal service, active in January, November, and December. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.

You'll find the most flights from St. Louis, MO (STL-Lambert-St. Louis Intl.) to San Francisco, CA (SFO-San Francisco Intl.) on a Friday, with around 76 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include Southwest Airlines, United, and American Airlines. Flight schedules are fairly consistent throughout the week, with Fridays offering only slightly more options compared to other weekdays.

The most popular departure times for flights from Lambert-St. Louis Intl. (STL) to San Francisco Intl. (SFO) are in the morning, from 6am to 9am. Many major carriers, including Southwest Airlines, American Airlines and United, offer flights during this window. This timing works well for travelers who want to arrive in San Francisco early in the day, giving them more time to enjoy their destination.

A non-stop flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to San Francisco, CA (SFO-San Francisco Intl.) typically takes around 4 hours 30 minutes. This route covers a distance of approximately 2,787 kilometres. If you opt for a one-stop flight, your travel time will be longer, usually around 8 hours. Flights with two or more stops will take even longer, averaging about 11 hours. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic, so it's always a good idea to allow for some extra time when planning your journey.

You can fly business class or first class between STL and SFO.

Airlines that offer business class service on this route include:

• Frontier Airlines
• Delta

First class cabins are available on:

• Alaska Airlines
• Delta
• United
• American Airlines

It's easy to earn miles on a St. Louis, MO (STL-Lambert-St. Louis Intl.) to San Francisco, CA (SFO-San Francisco Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.

*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.

If you're planning to travel to San Francisco from Lambert-St. Louis Intl. (STL), you can fly directly into San Francisco Intl. (SFO). Some flights may connect through major hubs like Seattle - Tacoma Intl. (SEA), Love Field (DAL), or Sky Harbor Intl. (PHX) before reaching San Francisco. Compare routes and airports on Expedia to find the best flight options for your travel plans.

Typically, booking a last minute flight from St. Louis, MO (STL-Lambert-St. Louis Intl.) to San Francisco, CA (SFO-San Francisco Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.

Securing a St. Louis, MO (STL-Lambert-St. Louis Intl.) to San Francisco, CA (SFO-San Francisco Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.

If you booked your St. Louis, MO (STL) to San Francisco, CA (SFO) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.