$165 Cheap Flights from Monterey (MRY) to St. Louis (STL)

View $165 flight on Tue, Oct 28, 2025Opens in a new window

Popular airlines from Monterey Peninsula Airport (MRY) to St. Louis Lambert Intl. Airport (STL)

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Cheap Flights from Monterey to St. Louis (MRY-STL)

Prices were available within the past 7 days and start at $165 for one-way flights and $319 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Wed, Oct 29 - Tue, Nov 4
MRY
Monterey
STL
St. Louis
$319 Roundtrip, found 6 days ago
$319
Roundtrip
found 6 days ago
Select American Airlines flight, departing Wed, Oct 29 from Monterey to St. Louis, returning Tue, Nov 4, priced at $319 found 6 days ago
United
Wed, Oct 29 - Tue, Nov 4
MRY
Monterey
STL
St. Louis
$319 Roundtrip, found 6 days ago
$319
Roundtrip
found 6 days ago
Select United flight, departing Wed, Oct 29 from Monterey to St. Louis, returning Tue, Nov 4, priced at $319 found 6 days ago
American Airlines
Wed, Oct 29 - Tue, Nov 4
MRY
Monterey
STL
St. Louis
$321 Roundtrip, found 6 days ago
$321
Roundtrip
found 6 days ago
Select American Airlines flight, departing Wed, Oct 29 from Monterey to St. Louis, returning Tue, Nov 4, priced at $321 found 6 days ago
United
Wed, Oct 29 - Tue, Nov 4
MRY
Monterey
STL
St. Louis
$324 Roundtrip, found 6 days ago
$324
Roundtrip
found 6 days ago
Select United flight, departing Wed, Oct 29 from Monterey to St. Louis, returning Tue, Nov 4, priced at $324 found 6 days ago
United
Wed, Oct 29 - Tue, Nov 4
MRY
Monterey
STL
St. Louis
$327 Roundtrip, found 6 days ago
$327
Roundtrip
found 6 days ago
Select United flight, departing Wed, Oct 29 from Monterey to St. Louis, returning Tue, Nov 4, priced at $327 found 6 days ago
United
Wed, Oct 29 - Tue, Nov 4
MRY
Monterey
STL
St. Louis
$329 Roundtrip, found 6 days ago
$329
Roundtrip
found 6 days ago
Select United flight, departing Wed, Oct 29 from Monterey to St. Louis, returning Tue, Nov 4, priced at $329 found 6 days ago
United
Wed, Oct 29 - Tue, Nov 4
MRY
Monterey
STL
St. Louis
$335 Roundtrip, found 6 days ago
$335
Roundtrip
found 6 days ago
Select United flight, departing Wed, Oct 29 from Monterey to St. Louis, returning Tue, Nov 4, priced at $335 found 6 days ago
United
Wed, Oct 29 - Tue, Nov 4
MRY
Monterey
STL
St. Louis
$338 Roundtrip, found 6 days ago
$338
Roundtrip
found 6 days ago
Select United flight, departing Wed, Oct 29 from Monterey to St. Louis, returning Tue, Nov 4, priced at $338 found 6 days ago
Alaska Airlines
Wed, Oct 29 - Tue, Nov 4
MRY
Monterey
STL
St. Louis
$377 Roundtrip, found 6 days ago
$377
Roundtrip
found 6 days ago
Select Alaska Airlines flight, departing Wed, Oct 29 from Monterey to St. Louis, returning Tue, Nov 4, priced at $377 found 6 days ago
Hawaiian Airlines
Sat, Aug 30 - Tue, Sep 16
MRY
Monterey
STL
St. Louis
$390 Roundtrip, found 22 hours ago
$390
Roundtrip
found 22 hours ago
Select Hawaiian Airlines flight, departing Sat, Aug 30 from Monterey to St. Louis, returning Tue, Sep 16, priced at $390 found 22 hours ago
Flights from Monterey (MRY) to St. Louis (STL)
Origin airport
Monterey Peninsula
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Alaska Airlines, American Airlines, Hawaiian Airlines, United
Roundtrip price
$318
Distance
1719 mi

Monterey to St. Louis Flights

The cheapest times to fly from Monterey 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 Monterey to St. Louis are during the month of October. You can find some of the cheapest flights from Monterey to St. Louis with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Monterey 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 Monterey 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 Monterey to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $165 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 Monterey 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 Monterey 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 Monterey Peninsula Airport (MRY) to Lambert-St. Louis Intl. Airport (STL) cost?
Discover the latest flight deals from MRY to STL by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from MRY to STL?
The cheapest flights from MRY 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.
What is the cheapest airline that flies from MRY to STL?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from MRY to STL. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Monterey Peninsula Airport (MRY) to Lambert-St. Louis Intl. Airport (STL)?
There aren't any daily direct flights departing from Monterey Peninsula Airport (MRY) to Lambert-St. Louis Intl. Airport (STL). But you can choose flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be soaring above the clouds in no time.
What day of the week has the most flights from MRY to STL?
Friday is generally the busiest day for flights, while Tuesday is often the quietest.* Just remember that flight schedules can change depending on a range of factors, such as the time of year and carrier.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Monterey Peninsula Airport (MRY) to Lambert-St. Louis Intl. Airport (STL)?
To arrive at Lambert-St. Louis Intl. Airport (STL) on schedule, opt for a flight that leaves Monterey Peninsula Airport (MRY) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**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.
Is it cheaper to buy a plane ticket from Monterey Peninsula Airport (MRY) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Last-minute fares from MRY to STL are generally more expensive. For the cheapest rates, start searching for flights as early as possible. That being said, if your travel plans are flexible, it's possible to score a cheap fare just before your departure.
Is it cheaper to book a MRY to STL flight and hotel package?
Compared with arranging flights and hotels separately, booking a MRY 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. Simply pick your flights and select from our wide range of stays, then tailor your trip with other add-ons like tours, activities and car rentals.
Can I cancel or change the date of my flight from Monterey Peninsula Airport (MRY) to Lambert-St. Louis Intl. Airport (STL)?
If you reserved your MRY to STL flight within the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the type of fare you have, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for more information.

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*Available to One Key members.