Cheap Flights from Las Vegas to San Diego from US$20

Frequently Asked Questions

• What are the cheapest flights from Las Vegas to San Diego (LAS-SAN)?

  Based on Trip.com data, Frontier Airlines offers one-way fares as low as US$20 on Cheapest nonstop routes (e.g. LAS to SAN on Sat, Oct 24), while Frontier Airlines offers Cheapest nonstop round-trips from US$58 departing on Sat, Oct 17 and returning on Mon, Oct 19.

• Which airlines offer direct flights from Las Vegas to San Diego?

  At the moment, you can catch a nonstop flight from Las Vegas to San Diego with the following airlines, including: Alaska Airlines Frontier Airlines Delta Air Lines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.

• How long is a flight from Las Vegas to San Diego?

  It takes about 1 hour 27 minutes to fly from Las Vegas to San Diego.

• When is the best time to book flights from Las Vegas to San Diego?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Las Vegas to San Diego is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

• How many flights are there per week from Las Vegas to San Diego?

  Based on Trip.com data in the past 4 weeks, there is 109 flight per week flying from Las Vegas to San Diego. You can check the weekly schedule for popular airlines on this route below: Delta Air Lines: S/M/T/W/T/F/S -- DL3741 (13:28)

• How can I find the best deals on flights from Las Vegas to San Diego?

  To find best deals on flights from Las Vegas to San Diego, you can use various tools on Trip.com:
  · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Sat, Oct 24, with one-way flights priced at just US$20.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Frontier Airlines.
  · Set up price alerts to easily monitor ticket prices without having to check every day.
  · Check Trip.com flight deals and promo codes frequently.
  · Avoid peak season unless you book very early. It seems the peak season for San Diego travel is around January.
  · Get exclusive promo codes for Trip.com app users.

• When are flight tickets from Las Vegas (LAS) to San Diego (SAN) the cheapest?

  The cheapest months to fly from Las Vegas to San Diego is October, when demand for travel is lower.

• Which upcoming date is cheapest to fly from Las Vegas to San Diego on?

  After crunching the numbers on our October flight calendar, it's currently cheapest to fly from Las Vegas to San Diego on October 7, 2026 with Frontier Airlines, with prices starting at US$16.

• Which airports fly into San Diego from Las Vegas?

  You can land at any one of the following hubs in San Diego: McClellan-Palomar Airport (CLD), Marine Corps Air Station Miramar (NKX), and San Diego International Airport (SAN). Flying from Harry Reid International Airport to San Diego International Airport (LAS-SAN) is by far the most common option on this route.

• Is there any time difference between Las Vegas and San Diego?

  The time difference between San Diego and Las Vegas is 0m.

• How do I change or cancel my ticket from Las Vegas to San Diego?

  Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

• What is the average cost of a one-way flight from Las Vegas to San Diego?

  Based on Trip.com data for flights departing in the next 30 days, the average one-way fare from Las Vegas to San Diego is US$158. Fares vary by travel date, airline and availability.

• What is the average cost of a round-trip flight from Las Vegas to San Diego?

  Based on Trip.com data for travel in the next 30 days, the average round-trip fare from Las Vegas to San Diego is US$215. The final price depends on the outbound and return dates, airline and fare conditions.

• How do I book flights from Las Vegas to San Diego on Trip.com?

  Enter Las Vegas and San Diego, choose your travel dates and passengers, then compare flights by price, duration and baggage. Select a fare, review the change and cancellation rules, enter traveler details and complete payment to receive your confirmation.

• Are there budget airlines on the Las Vegas to San Diego route?

  Frontier Airlinesare the most popular budget airlines flying from Las Vegas to San Diego. Check baggage, seat and payment fees before comparing the final price.