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

You can find one-way and return flights from SFO to STL 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 SFO to STL ticket fares go up or down.

September is typically the cheapest month to fly from San Francisco International Airport (SFO) to Lambert-St. Louis International Airport (STL), with average return fares around AU$544. September often sees lower prices as the summer travel rush ends and before the holiday season begins, leading to reduced demand. Other cheap months to fly from SFO to STL include April and October.

There are 2 airlines offering direct flights from San Francisco Intl. (SFO) to Lambert-St. Louis Intl. (STL).
* United operates 9 direct flights from SFO to STL every week.
* Southwest Airlines operates 7 direct flights from SFO to STL every week.

To find a cheap flight from San Francisco, CA (SFO) to St. Louis, MO (STL), 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 San Francisco, CA (SFO-San Francisco Intl.) to St. Louis, MO (STL-Lambert-St. Louis 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 San Francisco, CA (SFO-San Francisco Intl.) to St. Louis, MO (STL-Lambert-St. Louis 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 best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.

You'll find approximately 2 nonstop flights per day from San Francisco, CA (SFO-San Francisco Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.). For even more choices, look at flights that include layovers, as there are around 147 connecting flights per day. Some common connection points include Los Angeles Intl. (LAX), O'Hare Intl. (ORD), and San Diego Intl. (SAN).

The earliest flight from San Francisco, CA (SFO-San Francisco Intl.) to St. Louis, MO (STL-Lambert-St. Louis Intl.) typically departs around 12:05 AM local time. This flight is operated by Delta and is a seasonal service active in May. 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 typically find the most flights from San Francisco International Airport (SFO) to St. Louis Lambert International Airport (STL) on a Thursday, with around 96 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include United, Alaska Airlines, and Southwest Airlines. Flight schedules are quite consistent throughout the week, with Thursdays offering only slightly more options than other days.

The most popular departure times for flights from San Francisco Intl. (SFO) to Lambert-St. Louis Intl. (STL) are in the afternoon, from 12pm to 3pm. Many major carriers, including United, Southwest Airlines and American Airlines, offer flights during this window. Many travellers prefer this time because it allows for a full morning before heading to the airport, and you'll arrive in St. Louis in the late afternoon or early evening.

A non-stop flight from San Francisco International Airport (SFO) to Lambert-St. Louis International Airport (STL) typically takes around 4 hours, covering a distance of approximately 2787 kilometres. If you opt for a one-stop flight, your travel time will be longer, usually around 7 hours 18 minutes. Flights with two or more stops will take even longer, averaging about 9 hours 48 minutes. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic.

Yes, you can fly business class or first class between SFO and STL. You can fly business class with Frontier Airlines and Delta.

First class cabins are available on Alaska Airlines, Delta, United, and American Airlines.

It's easy to earn miles on a San Francisco, CA (SFO-San Francisco Intl.) to St. Louis, MO (STL-Lambert-St. Louis 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 St. Louis from San Francisco Intl. (SFO), you can fly directly into Lambert-St. Louis Intl. (STL). Some flights may connect through major hubs like Los Angeles Intl. (LAX), Harry Reid International Airport (LAS), or San Diego Intl. (SAN) before reaching St. Louis. Compare routes and airports on Expedia to find the best flight options for your travel plans.

Typically, booking a last minute flight from San Francisco, CA (SFO-San Francisco Intl.) to St. Louis, MO (STL-Lambert-St. Louis 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 San Francisco, CA (SFO-San Francisco Intl.) to St. Louis, MO (STL-Lambert-St. Louis 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 San Francisco, CA (SFO) to St. Louis, MO (STL) 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.