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

View AU$419 flight on Tue, 19 Aug. 2025Opens in a new window

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

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 35% on select hotels after you book a flight*
  • payments icon

    Earn twice

    Earn your airline miles on top of our rewards
    Sign in

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

Prices were available within the past 7 days for one-way flights and round trip tickets 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)

October is typically the cheapest month to fly

From AU$182 - AU$486 per traveller.

Graph displaying average flight prices per month

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 56 mins

Your quick guide to flights from San Diego to St. Louis

Pick up great flights from San Diego to St. Louis

With Expedia, you have your pick of flights a day with 15 airlines covering flights from San Diego to St. Louis. Whether you’re on a business trip, a family holiday or a luxury break, just enter your travel dates, hit search then check out your choice of flights. Select from return, one way or multi-city flights, and use the advance search tool if you want a direct or refundable flight. You can narrow your search to show you just your preferred cabin class and airline, too. It’s all easy. You can book direct flights from San Diego to St. Louis that take around hours.

Find cheap flights from San Diego to St. Louis

From the great flight deals with prices currently ranging from to , you can choose to see the cheapest flights first. Generally, you can book the cheapest flights from San Diego to St. Louis around 4 to 6 weeks in advance. If your travel dates are flexible, try to avoid weekends and peak seasons – when you are more likely to grab the lowest prices. Even last minute, there are some impressive deals. The cheapest time to fly to St. Louis is normally in .

Reasons to book your flight from San Diego to St. Louis with Expedia

Expedia makes it easy to find, book, and travel, with everything you need all in one place. When you enter your travel details, find fantastic deals just for you on flight tickets from San Diego to St. Louis across all the main airline carriers, so you can save time, dollars, and hassle finding the perfect flight. If you think your plans could change, choose refundable flights so any changes won’t cost you more. Book your flight to St. Louis right now and, if you join Expedia Rewards, you earn points this time and every time you travel with Expedia.

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.

Explore a world of travel with Expedia

*Available to Expedia members.