$29 Cheap Flights to San Marcos, CA

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How much is the cheapest flight to San Marcos?

Prices were available within the past 7 days and start at $29 for one-way flights and $57 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines
United
Frontier Airlines
Alaska Airlines
American Airlines

Find the cheapest month to fly from Columbus (CMH) to San Diego (SAN)

January is typically the cheapest month to fly

From $119 - $559 per traveler.

Graph displaying average flight prices per month

Tips to find the cheapest flights to San Marcos

The cheapest day to fly

Get started finding a cheap flight to San Marcos on Expedia by either choosing a deal on this page or entering into the search bar your travel dates, origin airport, and whether you want roundtrip or one-way airfare. You can filter for flexibility, number of stops, airline, and departure/arrival times to find the best flight for you.

The cheapest month to fly

July is the cheapest month to fly to San Marcos. This coincides with the low season when fewer people travel. Whichever month you travel in, though, be sure to book at least a month in advance if you want to score cheap tickets to San Marcos. ARC's data shows that domestic flights booked 28 days or more before departure are typically 24% cheaper than those booked last minute.

The most affordable time to book a flight

Typically, a Sunday can be the cheapest time to book a flight to San Marcos, according to ARC’s data. On average, you could save between 6% and 13% by booking on a Sunday instead of a Friday, which is the most expensive day to make a reservation.

The cheapest round-trip tickets to San Marcos

The lowest price for round-trip flights to San Marcos in 2025 starts from from $57, while one-way tickets start from from $29. Expedia's effective search tool is one of the best ways to find a budget airfare. Simply enter your dates, and within seconds, it'll show you a vast selection of the cheapest flights to San Marcos. If you have a preferred departure time or airline, you can use the handy filters to customize your search.

The cheapest airlines flying to San Marcos

Southwest Airlines, United, Frontier Airlines, Alaska Airlines, Spirit Airlines, American Airlines are just some of the airlines that can typically offer cheap tickets to San Marcos. You can find their most affordable flights by using the “airline” search filter and then sorting prices from low to high. As a trusted partner of the world's leading airlines, Expedia offers you some of the best airfare deals to San Marcos and countless more destinations worldwide.

The most affordable airports to fly into

To view the cheapest airports to fly into for San Marcos, simply order your search results from lowest to highest price. Expedia's search tool compares flight prices for all airports close to your destination, so you don't have to manually search them one by one to find the cheapest flight to San Marcos. If you have a preferred place to fly into, take advantage of the “arrival airport” filter to narrow down your search on Expedia.

Save with a package

With Expedia's amazing package deals, you could save hundreds of dollars by booking your San Marcos plane tickets together with your accommodations, car rental, or activities. Just select the search wizard's “package” option to view some of the cheapest deals. Look out for the green savings label to see how much you're saving.

Date flexibility for the cheapest flights to San Marcos

If you can be flexible with your travel dates, it's a good idea to broaden your search by comparing prices on different days. This will open up more options, meaning you could uncover a less expensive flight to San Marcos.

Stopover savings

The cheapest tickets to San Marcos are sometimes those with a stopover. Book one of these flights, and you'll change planes at an airport en route to San Marcos. While the overall travel time might be longer than a non-stop flight, you may decide it's worth it for the money saved.

Get Expedia's Price Drop Protection

Price Drop Protection means that if your flight gets cheaper after booking, you'll be credited the difference*. This gives you peace of mind that you're getting one of the cheapest flights to San Marcos for your chosen departure. Expedia's Price Drop Protection is available for a small fee but is free to One Key Gold and Platinum tier members.

*Terms apply.

Use our Price Tracking feature

Expedia's Price Tracking feature is another great tool that removes the guesswork from finding cheap flights to San Marcos. Simply download the free Expedia app to your smart device and activate San Marcos flight price alerts for your travel dates. There's even a price predictor tool that uses historical data to indicate the best time to book, giving you peace of mind that you'll nab the lowest prices.

Book with Expedia

As well as Price Drop Protection and Price Tracking, Expedia's close partnership with a vast selection of the world's leading airlines means you're sure to find cheap flights to San Marcos. Plus, the One Key rewards program lets you earn real cash rewards on most bookings that you can use to save money on future trips. Best of all, it's free to join, and members often unlock exclusive discounts, too.

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

What month is the cheapest to fly to San Marcos?
The least expensive month for flights to San Marcos is typically August *. Set your travel dreams in motion without going over budget by flying when fares are at their lowest. *Cheapest month to fly is based on the month with the cheapest flight found on Expedia.com in the next 330 days.
Which US cities have the cheapest flights to San Marcos?
Get cheap flights to San Marcos from San Francisco, Las Vegas and San Jose. These cities generally offer the lowest fares to this top destination. But remember that holiday periods, demand and stopovers will also impact rates, so stay flexible and book when you see a bargain.
Which US cities fly direct to San Marcos?
You can fly to San Marcos without a stopover from 51 US destinations. To find a nonstop route, select "Direct flights only" when looking for flights to San Marcos on Expedia. Then, compare your options and pick the best departure from one of these cities:

  • San Francisco
  • Las Vegas
  • San Jose
  • Denver
  • Phoenix

How to find a cheap flight to San Marcos?
To snag cheap flights to San Marcos, book well in advance and visit during the off-season months of January and February. Want a handy tip? Depart on a Thursday and save 16% on average compared to those who travel on a Sunday.* Set up price tracking on the Expedia app and we'll let you know as soon as your fares drop.*Best day of the week to book, depart and ideal booking window recommendations based on average round-trip ticket prices for January through August 2023, sourced from Airline Reporting Corporation's (ARC) global airline sales database. Percentages noted are averages.
How to get a cheap last-minute flight to San Marcos?
It's possible to get awesome deals on last-minute departures to San Marcos, especially if your plans are flexible. Think about flying from a different hub, changing your trip dates or picking an alternative airline to get a cheap flight to San Marcos.
How far in advance should I book a flight to San Marcos?
To pick up some of the best deals on domestic journeys, book your flight to San Marcos 28 days ahead of your travel dates. For international flights, it's two to four months in advance. This boosts your chances of securing the departure dates and seats you want.**Best day of the week to book, depart and ideal booking window recommendations based on average round-trip ticket prices for January through August 2023, sourced from Airline Reporting Corporation's (ARC) global airline sales database. Percentages noted are averages.
Which day of the week is the cheapest day to buy a plane ticket to San Marcos?
Sundays are generally the best day to book a cheap flight to San Marcos, with savings of around 8% on average compared to a Friday. If you purchase tickets on a Friday, expect to pay more as this is often the most expensive day.**Best day of the week to book, depart and ideal booking window recommendations based on average round-trip ticket prices for January through August 2023, sourced from Airline Reporting Corporation's (ARC) global airline sales database. Percentages noted are averages.
Which airlines fly to San Marcos?
San Marcos has connections to 55 airports globally through 15 airlines, with San Diego Intl. Airport (SAN) as its primary entry point. Take your pick of these leading airlines to San Marcos when planning your trip:

  • Alaska Airlines
  • American Airlines
  • United Airlines
  • Delta Air Lines

Where do you fly into San Marcos?
If you're flying to San Marcos, the main airport to arrive at is McClellan-Palomar Airport (CLD). You can also head to nearby hubs like San Diego Intl. Airport (SAN), John Wayne Airport (SNA) or Palm Springs Intl. Airport (PSP). Another possibility to consider when you fly to San Marcos is Oceanside, CA (OCN).
How far is the airport from central San Marcos?
If you're arriving at McClellan-Palomar Airport (CLD), you'll be roughly 7 mi west of central San Marcos.
Can I save money by booking a San Marcos trip package?
Bundle your flights and accommodations and you could save hundreds of dollars. Better yet, you can add extras like activities and car rentals to your San Marcos flight and hotel package deal. With Expedia, it's a breeze to look after all your San Marcos travel plans in the same place.
Can I change or cancel my flight to San Marcos?
If you reserved your flight to San Marcos within the last 24 hours, you can often change or cancel it for free. After that, additional costs may apply depending on the airline's terms of service. To learn more, check out our Customer Service Portal. Remember that some flights are non-refundable, so you may be issued a credit toward future travel rather than a direct refund. During your search on Expedia, select the "No cancel fee" or "Changes included" boxes to find fares with flexible change policies.
Flights to San Marcos information
Destination airport
San Diego Intl.
Destination airport IATA code
SAN
Destination city name
San Diego
Roundtrip price
$57

Trending flights to San Marcos

Prices were available within the past 7 days and start at $29 for one-way flights and $57 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines

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*Available to One Key members.