$156 Cheap Flights from Sacramento (SMF) to St. Louis (STL)

View $156 flight on Tue, Sep 16, 2025Opens in a new window

Popular airlines from Sacramento Intl. Airport (SMF) to St. Louis Lambert Intl. Airport (STL)

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Cheap Flights from Sacramento to St. Louis (SMF-STL)

Prices were available within the past 7 days and start at $156 for one-way flights and $248 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Thu, Aug 21 - Wed, Aug 27
SMF
Sacramento
STL
St. Louis
$248 Roundtrip, found 2 hours ago
$248
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Thu, Aug 21 from Sacramento to St. Louis, returning Wed, Aug 27, priced at $248 found 2 hours ago
Frontier Airlines
Thu, Aug 21 - Thu, Aug 28
SMF
Sacramento
STL
St. Louis
$268 Roundtrip, found 2 hours ago
$268
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Thu, Aug 21 from Sacramento to St. Louis, returning Thu, Aug 28, priced at $268 found 2 hours ago
Frontier Airlines
Sun, Aug 3 - Wed, Aug 20
SMF
Sacramento
STL
St. Louis
$278 Roundtrip, found 13 hours ago
$278
Roundtrip
found 13 hours ago
Select Frontier Airlines flight, departing Sun, Aug 3 from Sacramento to St. Louis, returning Wed, Aug 20, priced at $278 found 13 hours ago
Southwest Airlines
Sun, Oct 5 - Tue, Oct 7
SMF
Sacramento
STL
St. Louis
$292 Roundtrip, found 5 days ago
$292
Roundtrip
found 5 days ago
Select Southwest Airlines flight, departing Sun, Oct 5 from Sacramento to St. Louis, returning Tue, Oct 7, priced at $292 found 5 days ago
Frontier Airlines
Thu, Sep 4 - Sun, Sep 14
SMF
Sacramento
STL
St. Louis
$298 Roundtrip, found 15 hours ago
$298
Roundtrip
found 15 hours ago
Select Frontier Airlines flight, departing Thu, Sep 4 from Sacramento to St. Louis, returning Sun, Sep 14, priced at $298 found 15 hours ago
Delta
Wed, Sep 10 - Sat, Sep 13
SMF
Sacramento
STL
St. Louis
$299 Roundtrip, found 5 days ago
$299
Roundtrip
found 5 days ago
Select Delta flight, departing Wed, Sep 10 from Sacramento to St. Louis, returning Sat, Sep 13, priced at $299 found 5 days ago
Alaska Airlines
Tue, Sep 23 - Sat, Sep 27
SMF
Sacramento
STL
St. Louis
$304 Roundtrip, found 6 days ago
$304
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Tue, Sep 23 from Sacramento to St. Louis, returning Sat, Sep 27, priced at $304 found 6 days ago
Delta
Tue, Aug 26 - Sat, Sep 6
SMF
Sacramento
STL
St. Louis
$305 Roundtrip, found 6 days ago
$305
Roundtrip
found 6 days ago
Select Delta flight, departing Tue, Aug 26 from Sacramento to St. Louis, returning Sat, Sep 6, priced at $305 found 6 days ago
Southwest Airlines
Wed, Sep 10 - Sat, Sep 13
SMF
Sacramento
STL
St. Louis
$310 Roundtrip, found 5 days ago
$310
Roundtrip
found 5 days ago
Select Southwest Airlines flight, departing Wed, Sep 10 from Sacramento to St. Louis, returning Sat, Sep 13, priced at $310 found 5 days ago
Hawaiian Airlines
Tue, Aug 26 - Wed, Aug 27
SMF
Sacramento
STL
St. Louis
$318 Roundtrip, found 2 hours ago
$318
Roundtrip
found 2 hours ago
Select Hawaiian Airlines flight, departing Tue, Aug 26 from Sacramento to St. Louis, returning Wed, Aug 27, priced at $318 found 2 hours ago

Find the cheapest month to fly from Sacramento (SMF) to St. Louis (STL)

October is typically the cheapest month to fly

From $134 - $397 per traveler.

Graph displaying average flight prices per month

Alternative airports near St. Louis

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Lambert-St. Louis Intl. STL. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $446
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $446
Flights from Sacramento (SMF) to St. Louis (STL)
Origin airport
Sacramento Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Hawaiian Airlines, Southwest Airlines, United
Roundtrip price
$248
Distance
1674 mi
Average flight time
6 hours 42 mins

Sacramento to St. Louis Flights

The cheapest times to fly from Sacramento to St. Louis

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Sacramento to St. Louis are during the month of August. You can find some of the cheapest flights from Sacramento to St. Louis with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Sacramento to St. Louis

Sunday is one of the best days to book for cheap flights from Sacramento to St. Louis: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Sacramento to St. Louis

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Sacramento to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $156 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Sacramento to St. Louis flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Sacramento to St. Louis airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Sacramento Intl. Airport (SMF) to Lambert-St. Louis Intl. Airport (STL) cost?
You can find cheap return fares from Sacramento Intl. Airport (SMF) to Lambert-St. Louis Intl. Airport (STL) starting at $337. Grab a seat and start your adventure. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Southwest Airlines flight leaving SMF on August 14 2025 and touching down at STL. The price was last updated on July 23 2025 and has not changed since.
What is the cheapest month to fly from SMF to STL?
The cheapest flights from SMF to STL are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Sacramento Intl. Airport (SMF) to Lambert-St. Louis Intl. Airport (STL)?
If you're departing from Sacramento Intl. Airport (SMF), you can jump on a direct flight to Lambert-St. Louis Intl. Airport (STL) with Southwest Airlines.
What is the cheapest airline that flies from SMF to STL?
Take off from SMF to STL with Southwest Airlines. This carrier currently has the cheapest one-way ticket on this route, starting from $169. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from SMF on October 18 2025. Prices were last updated on July 23 2025 and have not changed since.
How many flights per day from Sacramento Intl. Airport (SMF) to Lambert-St. Louis Intl. Airport (STL)?
On average, you can take your pick of 3 nonstop flights departing from Sacramento Intl. Airport (SMF) to Lambert-St. Louis Intl. Airport (STL) each week. If you can't find one that works for your schedule, think about hopping on a flight with a layover. Filter your search results on Expedia to include one or two stops and choose the next best alternative.
What are the most popular departure times for flights from Sacramento Intl. Airport (SMF) to Lambert-St. Louis Intl. Airport (STL)?
More passengers fly between SMF and STL at 12 PM than at any other time. Rather skip the crowds? Pick a flight outside the busiest times and you're likely to save on your fare as well.
What day of the week has the most flights from SMF to STL?
If you jet off on a Friday, you'll get the biggest range of options for flights from Sacramento Intl. Airport (SMF) to Lambert-St. Louis Intl. Airport (STL).
What is the earliest flight from Sacramento Intl. Airport (SMF) to Lambert-St. Louis Intl. Airport (STL)?
The earliest flight jetting off from Sacramento Intl. Airport (SMF) is at around 12:45PM UTC-8. Catch this flight and you'll reach Lambert-St. Louis Intl. Airport (STL) at approximately 6:25PM UTC-6. The total flight duration is 3h 40m.
How long does it take to fly from Sacramento Intl. Airport (SMF) to Lambert-St. Louis Intl. Airport (STL)?
Flights from SMF to STL have an average travel time of 3 hours and 40 minutes. The total distance between the two airports is 1,700 mi.
What airline has the least delays from SMF to STL?
Consider traveling with Southwest Airlines if you'd like to go straight from Sacramento Intl. Airport (SMF) to Lambert-St. Louis Intl. Airport (STL) without any delays. This airline has the strongest track record for punctuality, with an on-time performance of 82%. Want to get notified of any changes? You can keep an eye on your flight status using the Expedia App.
What is the best time to fly from Sacramento Intl. Airport (SMF) to Lambert-St. Louis Intl. Airport (STL)?
To land at Lambert-St. Louis Intl. Airport (STL) without delays, choose a flight that leaves from Sacramento Intl. Airport (SMF) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for St. Louis from Sacramento Intl. Airport (SMF)?
Explore your flight options from Sacramento Intl. Airport (SMF) to Lambert-St. Louis Intl. Airport (STL). This is the only airport in St. Louis you can arrive at if you're taking a direct flight.
Is it cheaper to buy a plane ticket from Sacramento Intl. Airport (SMF) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Holding off until just before your trip to book a ticket from SMF to STL generally means paying more. Although you may find some last-minute discounts, they're not always guaranteed. Keep your travel plans flexible for the best chance of snagging a bargain.
Is it cheaper to book a SMF to STL flight and hotel package?
Compared with arranging flights and hotels separately, booking a SMF to STL flight and hotel package with Expedia could lead to significant savings. Better still, having everything in one convenient place will take the stress out of planning your trip. Just pick your flights and select from our extensive range of hotels, then personalize your trip with other add-ons like car rentals and activities.
Can I cancel or change the date of my flight from Sacramento Intl. Airport (SMF) to Lambert-St. Louis Intl. Airport (STL)?
Usually, it's possible to cancel or reschedule your SMF to STL flight. However, for bookings made more than 24 hours ago, additional charges may apply. Check your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more details on our Customer Service portal.

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