£89 Cheap Flights from San Diego (SAN) to St. Louis (STL)

View £89 flight on Tue, 6 Jan 2026Opens in a new window

Popular airlines from San Diego Intl. Airport (SAN) to Lambert-St. Louis International Airport (STL)

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Cheap Flights from San Diego (SAN) to St. Louis (STL)

Prices were available within the past 7 days and start at £89 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Find the cheapest month to fly from San Diego (SAN) to St. Louis (STL)

November is typically the cheapest month to fly

From £87 - £335 per traveller.
Flight from San Diego to St. Louis route information
Origin airport
San Diego Intl.
Destination airport
Lambert-St. Louis Intl.
Distance
2487 km
Average flight time
6 hours 47 mins

Compare flights from San Diego to St. Louis easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from San Diego to St. Louis. Operating between them 3 flights per day, 20 airlines cover the route. And Southwest Airlines fly direct, getting you to Lambert-St. Louis Intl. in just 3hours. If you have a preferred carrier, use our advanced search tool to find the right flight from San Diego Intl. to Lambert-St. Louis Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from San Diego Intl. (SAN) to Lambert-St. Louis Intl. (STL)

The easiest way to view the best deals on flights from San Diego to St. Louis today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from San Diego Intl. to Lambert-St. Louis Intl. start at just and range up to .  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near San Diego and St. Louis
  • booking your flight during , the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your San Diego to St. Louis flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from San Diego Intl. to Lambert-St. Louis Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Frequently asked questions

How much is a flight from San Diego Airport to St. Louis Lambert International Airport?
If you're travelling from San Diego Airport to Lambert Field, round-trip journeys start from . This price is based on airfares listed within the last 7 days on Expedia for flights departing within the next year, so don't let a good deal pass you by. Book now and save yourself money and time. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from San Diego Intl. Airport (SAN) to Lambert-St. Louis Intl. Airport (STL)?
The majority of flights can be cancelled online, but whether you are charged a fee differs between airlines. If you do need to cancel your getaway, follow the instructions in the Customer Service Portal.
How do I find cheap flights from SAN to St. Louis Lambert International Airport that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for San Diego Airport to Lambert Field flights, you'll see a "no change fees" filter for you to select.
How far is the flight from San Diego Airport to Lambert-St. Louis Intl. Airport (STL)?
Expect to be cruising at altitude for a while, as the flight distance from SAN to Lambert-St. Louis Intl. Airport (STL) is 2,500 kilometres. Set up a playlist of your favourite tunes before you leave home to stay entertained during your trip.
Which airlines fly direct from San Diego Airport to STL?
Offering 30 flights every month, Southwest Airlines (WN) is a great choice when flying directly from San Diego Intl. Airport (SAN) to Lambert Field.
Are San Diego Airport to Lambert-St. Louis Intl. Airport (STL) flight tickets cheaper when they're purchased at the last minute?
Booking your trip from San Diego Intl. Airport (SAN) to STL at the last minute could be your ticket to a cheap deal. However, it could end up costing you a whole lot more! If you'd prefer to err on the side of caution, book well ahead of your departure date. In fact, Expedia has some of the biggest bargains up to 12 months in advance. If your preferred carrier hasn't released tickets yet, check back often as deals are updated all the time on Expedia.

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