SFO - STL

$59 Find Cheap Flights from San Francisco to St. Louis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Francisco to St. Louis departing on 3/10. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Francisco to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Francisco to St. Louis, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$126
Overall average: $338
Frontier
Wed 2/25Sat 2/28
SFO - STL • 1 stop
Cheapest non-stop
$378
Typical prices: $343-$513
Southwest
Tue 2/10Wed 2/11
SFO - STL • Non-stop
Our travelers' advice
AI-powered summary based on content written by travel experts. AI can make mistakes.
Southwest's two free checked bags save costs on luggage.
Use MetroLink from STL for easy downtown access.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Frontier
Cheapest • from $165 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 31% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
February
Cheapest • 22% price drop
May
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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We hope you love your trip to St. Louis!
Flight Deals
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Expert advice
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Francisco to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from San Francisco to St. Louis

Wed, Feb 25 - Sat, Feb 28
Frontier Logo
7:20 am - 3:53 pm
SFO
-
STL
6h 33m
1 stop
Frontier Logo
2:51 pm - 12:28 am
STL
-
SFO
11h 37m
1 stop
$126Frontier
Wed, Feb 25 - Sat, Feb 28
Frontier Logo
7:20 am - 3:53 pm
SFO
-
STL
6h 33m
1 stop
Frontier Logo
2:51 pm - 12:28 am
STL
-
SFO
11h 37m
1 stop
$148Frontier
Wed, Feb 25 - Sat, Feb 28
Frontier Logo
7:20 am - 3:53 pm
SFO
-
STL
6h 33m
1 stop
Frontier Logo
2:51 pm - 9:56 am
STL
-
SFO
21h 05m
2 stops
$156Frontier
Thu, Feb 26 - Sat, Feb 28
Frontier Logo
8:43 am - 9:26 pm
SFO
-
STL
10h 43m
1 stop
Frontier Logo
2:51 pm - 12:28 am
STL
-
SFO
11h 37m
1 stop
$165Frontier
Wed, Feb 25 - Sun, Mar 1
Frontier Logo
7:20 am - 3:53 pm
SFO
-
STL
6h 33m
1 stop
Frontier Logo
10:11 pm - 2:23 pm
STL
-
SFO
18h 12m
2 stops
$166Frontier
Sat, Feb 28 - Sat, Mar 7
Frontier Logo
11:16 pm - 6:51 am
SFO
-
STL
29h 35m
1 stop
Frontier Logo
8:12 pm - 11:29 pm
STL
-
SFO
29h 17m
1 stop
$167Frontier
Thu, Mar 5 - Mon, Mar 9
Frontier Logo
8:43 am - 11:19 am
SFO
-
STL
24h 36m
1 stop
Frontier Logo
8:12 pm - 8:09 pm
STL
-
SFO
25h 57m
1 stop
$172Frontier
Tue, Apr 7 - Wed, Apr 8
Frontier Logo
9:00 pm - 9:48 am
SFO
-
STL
10h 48m
1 stop
Frontier Logo
8:16 pm - 12:23 am
STL
-
SFO
6h 07m
1 stop
$180Frontier
Thu, Feb 19 - Mon, Feb 23
Frontier Logo
8:48 am - 1:09 pm
SFO
-
STL
26h 21m
1 stop
Frontier Logo
10:11 pm - 6:20 pm
STL
-
SFO
22h 09m
1 stop
$181Frontier
Wed, Feb 18 - Wed, Feb 25
Frontier Logo
7:15 pm - 9:26 pm
SFO
-
STL
24h 11m
1 stop
Frontier Logo
4:51 pm - 12:28 am
STL
-
SFO
9h 37m
1 stop
$185Frontier
Booking Insights

KAYAK's insights & trends for San Francisco to St. Louis flights

Get data-powered insights and trends into flights from San Francisco to St. Louis to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from San Francisco to St. Louis?

The average price of all round-trip flights from San Francisco to St. Louis clicked on KAYAK for each day over the last 12 months.

When flying from San Francisco to St. Louis, you should consider leaving on a Tuesday and avoid Mondays if you are looking for the best rates. For your return to San Francisco, you’ll find the best rates on Thursdays and the most expensive ones on Mondays.

What is the cheapest month to fly from San Francisco to St. Louis?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Francisco to St. Louis, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from San Francisco to St. Louis is February, where tickets cost $338 (return) on average. On the other hand, the most expensive months are December and November, where the average cost of round-trip tickets is $573 and $487 respectively.

How far in advance should I book a flight from San Francisco to St. Louis?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from San Francisco to St. Louis, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from San Francisco to St. Louis, you should book around 4 weeks before departure, which saves you about 31% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 9 weeks before departure.

Expert advice

Expert advice for your flight from San Francisco to St. Louis

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on United Airlines

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Blane Bachelor

Blane Bachelor

Expert on Southwest and SFO

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Yulia Denisyuk

Yulia Denisyuk

Expert on STL

Yulia is a freelance journalist who’s dispatched from 90+ countries. Her work focuses on cultures, adventure trips and air travel, appearing in NatGeo, NYT, CNTraveler, and more. For past assignments, she’s stayed with nomads in Mongolia and learned the art of Imigongo in Rwanda. She’s based in Chicago; in winter she often questions that decision.

Good to know

Low seasonJanuary
Cheapest flight$59
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly and prices are also 2% lower on average.
Flight from San Francisco to St. Louis

When to book flights from San Francisco to St. Louis

Are your dates flexible? Find out the best times to travel from San Francisco to St. Louis based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from San Francisco to St. Louis

  • What is the preferred means of transport to the city center from STL airport?

    The bus ride from Lambert-St. Louis International Airport (STL) to the Central Business District of St. Louis takes around 30min and costs about $9 to $14 one way.

  • Can I rent a car at STL airport?

    Car rental agencies Alamo, Avis, and Budget are all present at the St. Louis Lambert International Airport for your convenience. The automobile rental firms provide a complimentary shuttle service that runs around the clock and goes directly to the off-airport facilities where customers are expected to return their cars.

  • Is there a hotel at SFO airport?

    Take pleasure in opulent suites with floor-to-ceiling windows that frame breathtaking views of the airport and the bay. The Grand Hyatt at SFO is a premium hotel located very next to San Francisco International Airport. The hotel, which is situated in a convenient location near the entrance to SFO, can be reached quickly and simply from all terminals by either the road or the AirTrain.

  • Where can I park at SFO airport?

    There are five lots for on-site parking at San Francisco International Airport. They are the Domestic Garage, International Garage G, International Garage A, Long Term Surface, and Long Term Garage. Valet parking is available at the airport, providing an additional 150 parking spots. There are plenty of parking lots at the airport, but they fill up quickly.

  • What is the cheapest flight from San Francisco to St. Louis?

    In the last 3 days, the lowest price for a flight from San Francisco to St. Louis was $59 for a one-way ticket and $126 for a round-trip.

  • Do I need a passport to fly between San Francisco and St. Louis?

    No

  • Which airports will I be using when flying from San Francisco to St. Louis?

    San Francisco and St. Louis are both served by 1 main airport. You will leave San Francisco from San Francisco and will be arriving at Lambert-St Louis.

  • Which airlines offer Wi-Fi service onboard planes from San Francisco to St. Louis?

    JetBlue, Alaska Airlines, Delta, Hawaiian Airlines, and American Airlines offer inflight Wi-Fi service on the San Francisco to St. Louis flight route.

  • Which aircraft models fly most regularly from San Francisco to St. Louis?

    The Boeing 737 MAX 8 is the aircraft model that flies most regularly on the San Francisco to St. Louis flight route.

  • Which airline alliances offer flights from San Francisco to St. Louis?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between San Francisco and St. Louis, with oneworld being the most commonly used for this route.

  • On which days can I fly direct from San Francisco to St. Louis?

    There are nonstop flights from San Francisco to St. Louis on a daily basis.

  • Which is the best airline for flights from San Francisco to St. Louis, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from San Francisco to St. Louis are Southwest and Delta. With an average price for the route of $494 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $383 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from San Francisco to St. Louis?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from San Francisco to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from San Francisco to St. Louis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from San Francisco is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from San Francisco to St. Louis?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to San Francisco with another airline. Booking your flights between San Francisco and STL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from San Francisco to St. Louis?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from San Francisco up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from San Francisco to St. Louis

  • Looking for a cheap flight? 25% of our users found flights on this route for $239 or less one-way and $372 or less round-trip.
  • You may enter lounges at San Francisco International Airport (SFO) if you have just landed there and want to take some time to unwind. If you want to make the most of your departure or stopover at SFO, visit the American Express Centurion Lounge, which is an airport lounge that serves some of the finest cuisine, wine, and other beverages available. You are going to really like everything, including the free Wi-Fi, the local cuisine, the wine tasting, and the assortment of cocktails.
  • Moms who are traveling via SFO have access to 19 breastfeeding facilities, including 13 nursing rooms that are elegant, large, and private. At the airport, there are private rooms available for women who are breastfeeding or pumping their milk. Before and after passing through security, passengers are welcome to utilize the nursing rooms located in Terminals 1, 2, and 3 located around the airport.
  • There are a few designated areas in each terminal at San Francisco International Airport where pets may relieve themselves. Customers may utilize the services at either Terminal 1 or Terminal 3 after they have cleared security. Pre-security screenings are performed outside the terminal on the Arrivals Level curbside; simply follow the painted paw-prints. That is to say, these inspections take place away from the terminal building.
  • There is often activity even throughout the night at the St. Louis airport (STL) since it serves a large number of domestic as well as some foreign destinations with its airline operations. Layover travelers are required to stay in the public area until the security checkpoint shuts for the night, despite the fact that the terminals are open around the clock.
  • Helpful services are available at both STL and SFO to accommodate travelers who may need guidance while moving around the airport or using any of its numerous amenities. If you have any concerns regarding their wheelchair rental services or airport transportation alternatives, you may reach out to them before, during, or after your trip. Notify the airline in advance if you want to use these services.

Prefer to fly direct from San Francisco to St. Louis?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from San Francisco to Lambert-St Louis.
Find which airlines fly direct from San Francisco Airport to Lambert-St Louis Airport, which days they fly and book direct flights.

Direct departures

San Francisco to Lambert-St Louis

Monday

Southwest, United Airlines

Southwest, United Airlines

Tuesday

Southwest, United Airlines

Southwest, United Airlines

Wednesday

Southwest, United Airlines

Southwest, United Airlines

Thursday

Southwest, United Airlines

Southwest, United Airlines

Friday

Southwest, United Airlines

Southwest, United Airlines

Saturday

Southwest, United Airlines

Southwest, United Airlines

Sunday

Southwest, United Airlines

Southwest, United Airlines

See more direct flights

Direct returns

Lambert-St Louis to San Francisco

Monday

Southwest, United Airlines

Southwest, United Airlines

Tuesday

Southwest, United Airlines

Southwest, United Airlines

Wednesday

Southwest, United Airlines

Southwest, United Airlines

Thursday

Southwest, United Airlines

Southwest, United Airlines

Friday

Southwest, United Airlines

Southwest, United Airlines

Saturday

Southwest, United Airlines

Southwest, United Airlines

Sunday

Southwest, United Airlines

Southwest, United Airlines

See more direct flights

Reviews of the top 5 airlines serving from San Francisco to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from San Francisco to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from San Francisco to St. Louis? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4267 reviews
8.0Comfort
7.5Entertainment
8.1Boarding
7.0Food
8.6Crew
Airline reviews

3 hour delay. Had to change plans and was still delayed.

2.0 MediocreAnonymous, Jan 2026
SFO - SAN
Read more Southwest reviews

3 hour delay. Had to change plans and was still delayed.

We got exit row seats both flights. Everything was running on time

The boarding and seat assignment system no longer works for me, but I know it is being replaced. Otherwise, I am good with the overall experience.

The lead steward kept singing about "San Francisco" and hotel California---more annoying than humorous....needs work. Flight was smooth and on time.

San Diego airport is brand new, spacious, airy and very smooth checkin at SW baggage drop.

Crew could have been friendlier, maybe I'm spoiled by SW crews. In flight wifi was good. Would be nice to have more food offerings on a 4 plus hour flight

Ever since Southwest starting charging for bags, passengers don't want to pay to check their bags, so the gate agents have to beg people to check their roller bags now because there's "not enough space". This was a terrible business move by Southwest.

Sacrament staff are always polite and helpful. Airport is easy to maneuver and boarding is straightforward.

Boarded on time but once we were ready for take off, the crew determined that, although every seat was taken, somehow someone was on the wrong flight. Delay, delay delay, announcements and ended up with one person checking EVERY ID against their passenger Manifest only to figure out it was a "clerical error." We departed 54 minutes late causing me to run in the St. Louis Airport to make my connection and lose the priority boarding spot I had paid for. Unnecessary delay.

Flight was delayed due to plane not passing inspection And one of the crew had to time out and we had to wait for another one A 3 hour delay

Delta’s staff is unmatched. From the gate agents, to the pilots, to the flight attendants… all top of the industry.

The flight was delayed for about 2 hrs. Other than it, it was good.

I am extremely disappointed that delta internal pilot manuals now refer to the Gulf of Mexico as the “gulf of America”. You can bow down to the Orange turd on your own. I will never fly delta again

No lunch on a x-country flight scheduled for 10:50 am departure, arrived 5+ hrs later. That requires a black box label before you pay for the tickets. Worst, when I checked in online, it's specifically said that lunch was served on his flight for economy Plus passengers.

Our flight from SFO to MSP was right on time on 11/15/2025. No delays. As we approached MSP at about 8 pm, we circled in the air until 8:40 pm so I don't call that efficient for MSP. I think the captain should announce the delay and why. (as if we all don't know that we are just circling around the area, slowing down, speeding up, slowing down.) Thank you. Marilyn Fischer

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

Delayed flight (1hour) plus a long layover after an overnight flight with no backup plane available.

The boarding process needs to be refined. Sometimes the gate crew calls out the zones and then flip to showing the.zones boarding on the gate monitor display. So, unless you are huddled around the gate lanes watching the monitor, you could miss your boarding zone. Suggest the zones be announced each time a new zone is allowed to board.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

The flight crew where really good. Better then the crew from BNE to SFO

Food should be changed in menu Many muslims travels in this airlime they need to add one Halal meal

left on time, reasonable boarding process arrived early luggage came out quickly

Some flight attendants were great others were cranky. Seats were very tight and sitting on an aisle was very hard as the carts and people walking constantly bumped shoulder and arm.

Pushed back only to get deplaned due to a tire damaged by ground crew. They did at least go pretty fast. The bathrooms should be banned under the Geneva convention. No room to even sit straight on the toilet. The under-seat entertainment units block what little leg room there is.

United airlines has the best customer experience from booking to arrival. I always fly United airlines. The mileage program is excellent

Older aircraft, no meal, only food was for purchase. Not impressed United.

Not pleasant trip cross country when the entertainment and WiFi system not working. No entertainment for entirety of route. Staff was rather nonchalant in that they dismissed the problem due to age of plane. It would have been nice to know this up front so I could have come prepared to read or download movies before boarding Coincidentally or not, there was a similar issue with the entertainment system on my previous flight I took on my fist leg of the trip. There are no seat TVs, so you must rely on the app when it works. United can do better. Also, what use it it to pay for boarding group 2 when half of the passengers are in the same line as you?

Premium Plus is a really good idea for longer flights

Excellent flight. Smooth, efficient boarding. Quick flight. Arrived early at STL.

The flight was on time and arrived early. The crew were friendly and helpful.

Overall experience was great. Flights were almost on time in departing and we arrived at our destination as scheduled. No issues with amenities or flight crew. Everything went well as as expected. Will fly again with American Airlines in the future!

Horrible. Both legs of my flight were delayed more than 6 hours. No compensation, no screens on the plane, and the plane was not clean.

The flight was smooth, the pilot kept us informed about delays and we arrived more of less on time

The flight was flawless and we even arrived between 20 and 25 minutes early!

Always seated jammed in rear of aircraft Admirals Club food at DFW terminal D was absolute worst food experience and I pay $600/year to eat this dried out junk

Mostly good. Flight was crowded but Airline personnel were very friendly & accommodating. It would be good to have savory snacks rather than just sweet Biscoff cookies.

It was a red eye flight, so no meals were provided, but it was fine with snacks. The seats felt cramped and almost too narrow.

Very crowded flight but what can you expect these days?? Crew was accommodating.

The seats in economy were appeared to be quite thin and lack sufficient cushioning to be comfortable. Perhaps it was my seating position but the plane seemed notably load.

I am writing to express my disappointment with my recent Frontier Airlines flight. I was charged $99 at the gate because my bag was said to be too large, yet once onboard there was no available overhead bin space, and I was required to place the bag under the seat in front of me anyway. This made the charge feel unnecessary and unfair. Additionally, before the flight even took off, I was asked to move from the seat I paid for into a middle seat so another passenger and her cat could have my seat to themselves. I was not offered compensation or an explanation for being moved from a paid seat. Between the unexpected bag fee and being forced to give up my seat, this experience fell well below acceptable customer service standards. I would appreciate a review of this situation and appropriate compensation.

It was costly and difficult to check in. $85 to take a small suitcase with me, carry on or checked and $75 on the return trip, Plus $25 if I didn't check my self in check in $25, because I couldn't do it on the kiosk. Small very uncomfortable seats, waited on the runway for near an hour each way. It was my worst flight to date.

It was ok. It was expensive to check 2 bags ($75.00 per bag), and then it took a long time to wait for shuttle to take us from one terminal to the terminal where the plane was taking off at LAX. And all of this for a flight where we had to pay for any food or drink that was not water.

It didn’t happen. I booked it and then was told it wasn’t available and then forced to pay far higher prices for a worse option

A 630departure flight Delayed 6hours! They changed my gate, I moved to the new gate. Had our flight on the screen for 12noon departure. I go get above to eat, check screen again and the flight was gone, no notice no announcement, nothing!! They sent my bag on the flight I wasn’t on, got it back to me 3days later. Thank goodness they did refund my money but I will NEVER fly them again.

When I wanted to check in 3 hours prior to boarding time, the employees mentioned “a little over an hour delay” so I waited for an hour then I went to go look for food in the terminal and most people from that flight were in the same area looking for food. Finally I decided after food to check to see if it’s anytime closer and now it’s 2 mins until boarding closes?! What are you kidding me? I didn’t receive anything via sms about boarding now nor via email or on the intercom. I luckily made it through, barely, and then there’s no room for my carry on mind you I’m in the very first row so I had to place my purse in one further row back and my carry on sections down. Not sure who pays for better seats to get your stuff placed all over the plane but that was the worst experience I’ve ever had flying with anyone.

This airline sucks. They offer low rates then charge you for everything, the app does not work well, the seats are the most uncomfortable. Maintenance issues on the flight, and you still have to sit through their credit card commercials. People are nice enough but does not make up for overall poor experience.

Cancelled flight after I arrived at airport after 75 min drive and parking. Next flight was 4 days in the future. Had to scramble and buy a much more expensive flight on another carrier.

I liked the turn-style feature at gate 209B at LAX. Very efficient process. The gate staff also made several, clearly directed announcements so I felt very informed.

The seats were awful, hard plastic covered in sheet vinyl. The airline tries to scam you into paying extra to get seat together when the flight wasn’t full. They were going to separate a family with young children but my wife who had a row to herself gave up her seat so the young mom could be with her young boys. I’m never giving this airline my money again.

Everything you need to know for your flight from San Francisco to St. Louis

Information on your arrival and departure airports