Cheap Flights from San Diego (SAN) to Gaithersburg (GAI)

Popular airlines from San Diego Intl. Airport (SAN) to Gaithersburg, MD (GAI-Montgomery County Airpark)

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Alternative airports near Gaithersburg

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

Select flight to Ronald Reagan Washington National DCA. Cheapest option available. Average driving time to city center is 38 minutes. Flights from $130
DCA
Ronald Reagan Washington National
Cheapest
Average driving time to city center38 min
Flights from $130
Select flight to Baltimore Washington Intl. Thurgood Marshall BWI. Average driving time to city center is 46 minutes. Flights from $375
BWI
Baltimore Washington Intl. Thurgood Marshall
Average driving time to city center46 min
Flights from $375

Frequently asked questions

How much does a flight from San Diego Intl. Airport (SAN) to Gaithersburg, MD (GAI-Montgomery County Airpark) cost?
Get a cheap one-way flight or cheap return flight from San Diego Intl. Airport (SAN) to Gaithersburg, MD (GAI-Montgomery County Airpark) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from San Diego Intl. Airport (SAN) to Gaithersburg, MD (GAI-Montgomery County Airpark)?
Planning your getaway for is a great way to save, as it's the cheapest month for flights between SAN and GAI. You'll typically find the lowest prices during the off-season.
What is the cheapest airline that flies from San Diego Intl. Airport (SAN) to Gaithersburg, MD (GAI-Montgomery County Airpark)?
To find the cheapest airline flying from SAN to GAI, use Expedia's filter tool. Tailor your search based on your travel needs, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from San Diego Intl. Airport (SAN) to Gaithersburg, MD (GAI-Montgomery County Airpark)?
Direct flights from San Diego Intl. Airport (SAN) to Gaithersburg, MD (GAI-Montgomery County Airpark) aren't available daily, so you'll need to take a flight with a layover. Explore your options with our filter tool. Enter your dates and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SAN to GAI?
Friday is usually the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can change based on a range of factors, such as the season and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from San Diego Intl. Airport (SAN) to Gaithersburg, MD (GAI-Montgomery County Airpark)?
To reach Gaithersburg, MD (GAI-Montgomery County Airpark) on schedule, opt for a flight that leaves San Diego Intl. Airport (SAN) before 3 PM. The chance 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.
What airports do you fly into for Gaithersburg from San Diego Intl. Airport (SAN)?
Board a direct flight from San Diego Intl. Airport (SAN) to Gaithersburg and land at Washington Dulles Intl. Airport (IAD). Another gateway to this city is Baltimore Washington Intl. Thurgood Marshall Airport (BWI).
Is it cheaper to buy a plane ticket from San Diego Intl. Airport (SAN) to Gaithersburg, MD (GAI-Montgomery County Airpark) last-minute?
Booking your ticket from SAN to GAI just before your trip is generally more expensive. But if there's some wiggle room with your departure dates and times, you could snag a cheap last-minute fare.
Is it cheaper to book a SAN to GAI flight and hotel package?
You'll typically save money by booking a SAN to GAI flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one place. After selecting your preferred flights and accommodations, consider adding extras such as car rentals, activities and tours.
Can I cancel or change the date of my flight from San Diego Intl. Airport (SAN) to Gaithersburg, MD (GAI-Montgomery County Airpark)?
If you reserved your SAN to GAI flight within the last 24 hours, you may be able to cancel or modify it at no cost. Depending on the airline and the type of fare you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal if you want more information.

Travel information

Origin airport
San Diego Intl.
Destination airport
Montgomery County Airpark
Distance
2264 mi

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San Diego to Gaithersburg Flights

The cheapest times to fly from San Diego to Gaithersburg

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 San Diego to Gaithersburg are during the month of . You can find some of the cheapest flights from San Diego to Gaithersburg with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from San Diego to Gaithersburg

Sunday is one of the best days to book for cheap flights from San Diego to Gaithersburg: 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 San Diego to Gaithersburg

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 San Diego to Gaithersburg in 2025. You can also book with separate airlines for your outbound and return journeys, from 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 San Diego to Gaithersburg 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 San Diego to Gaithersburg 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.

 

San Diego to Gaithersburg Flights

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*Available to One Key members.