Cheap Flights to San Diego County | Popular Routes to San Diego County from HK$2,598

View HK$2,598 flight on Tue, 5 May 2026Opens in a new window

Popular airlines to San Diego County

  • Alaska Airlines

  • American Airlines

  • United

  • Delta

  • Southwest Airlines

  • Frontier Airlines

  • JetBlue Airways

  • Be in the know

    Get alerts if flight prices drop or rise*

  • Book smarter

    Save up to 35% on select hotels after you book a flight*

  • Earn twice

    Earn your airline miles on top of our rewards
    Sign in

Cheap round-trip flights to San Diego County

Prices were available within the past 7 days and start at HK$2,598 for one-way flights and HK$3,550 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, 12 Nov - Tue, 17 Nov
PHL
Philadelphia
SAN
San Diego
HK$3,550 Return, found 5 days ago
HK$3,550
Return
found 5 days ago
Select Delta flight, departing Thu, 12 Nov from Philadelphia to San Diego, returning Tue, 17 Nov, priced at HK$3,550 found 5 days ago
Delta
Thu, 12 Nov - Tue, 17 Nov
PHL
Philadelphia
SAN
San Diego
HK$3,808 Return, found 5 days ago
HK$3,808
Return
found 5 days ago
Select Delta flight, departing Thu, 12 Nov from Philadelphia to San Diego, returning Tue, 17 Nov, priced at HK$3,808 found 5 days ago
Delta
Tue, 5 May - Tue, 12 May
PHL
Philadelphia
PSP
Palm Springs
HK$3,906 Return, found 7 hours ago
HK$3,906
Return
found 7 hours ago
Select Delta flight, departing Tue, 5 May from Philadelphia to Palm Springs, returning Tue, 12 May, priced at HK$3,906 found 7 hours ago
Delta
Thu, 12 Nov - Tue, 17 Nov
PHL
Philadelphia
SAN
San Diego
HK$4,270 Return, found 5 days ago
HK$4,270
Return
found 5 days ago
Select Delta flight, departing Thu, 12 Nov from Philadelphia to San Diego, returning Tue, 17 Nov, priced at HK$4,270 found 5 days ago
Delta
Tue, 5 May - Tue, 12 May
PHL
Philadelphia
PSP
Palm Springs
HK$4,336 Return, found 7 hours ago
HK$4,336
Return
found 7 hours ago
Select Delta flight, departing Tue, 5 May from Philadelphia to Palm Springs, returning Tue, 12 May, priced at HK$4,336 found 7 hours ago
American Airlines
Thu, 12 Nov - Tue, 17 Nov
PHL
Philadelphia
SAN
San Diego
HK$4,340 Return, found 5 days ago
HK$4,340
Return
found 5 days ago
Select American Airlines flight, departing Thu, 12 Nov from Philadelphia to San Diego, returning Tue, 17 Nov, priced at HK$4,340 found 5 days ago
American Airlines
Tue, 5 May - Tue, 12 May
PHL
Philadelphia
PSP
Palm Springs
HK$4,367 Return, found 7 hours ago
HK$4,367
Return
found 7 hours ago
Select American Airlines flight, departing Tue, 5 May from Philadelphia to Palm Springs, returning Tue, 12 May, priced at HK$4,367 found 7 hours ago
United
Tue, 5 May - Tue, 12 May
PHL
Philadelphia
PSP
Palm Springs
HK$4,378 Return, found 7 hours ago
HK$4,378
Return
found 7 hours ago
Select United flight, departing Tue, 5 May from Philadelphia to Palm Springs, returning Tue, 12 May, priced at HK$4,378 found 7 hours ago
American Airlines
Thu, 12 Nov - Tue, 17 Nov
PHL
Philadelphia
SAN
San Diego
HK$4,418 Return, found 5 days ago
HK$4,418
Return
found 5 days ago
Select American Airlines flight, departing Thu, 12 Nov from Philadelphia to San Diego, returning Tue, 17 Nov, priced at HK$4,418 found 5 days ago
Alaska Airlines
Mon, 4 May - Thu, 7 May
PHL
Philadelphia
PSP
Palm Springs
HK$7,302 Return, found 7 hours ago
HK$7,302
Return
found 7 hours ago
Select Alaska Airlines flight, departing Mon, 4 May from Philadelphia to Palm Springs, returning Thu, 7 May, priced at HK$7,302 found 7 hours ago

Trending flights to San Diego County

These prices were available within the past 7 days. Prices quoted are per person, return, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, 16 Jun - Fri, 3 Jul
HKG
Hong Kong SAR
SAN
San Diego
HK$7,300 Return, found 16 hours ago
HK$7,300
Return
found 16 hours ago
Select Delta flight, departing Tue, 16 Jun from Hong Kong SAR to San Diego, returning Fri, 3 Jul, priced at HK$7,300 found 16 hours ago

Frequently asked questions

Can I cancel my flight booking to San Diego County due to COVID-19?
If you haven't booked yet, look through the terms and conditions of your preferred carrier. If you've already purchased your flight to San Diego County, click through to our Customer Service Portal. It will help you determine which COVID-19 policies apply to your booking and provide advice on the next steps.
What's the best way to find cheap flights to San Diego County that have flexible change policies?
It's as easy as can be with Expedia. Step 1: Type in your travel details and click "Search." Step 2: Check the "No change fee" box directly below the "Flexible change policies" heading to the left of the screen. Step 3. Snag your flexible and cheap flight to San Diego County.
What are some of the general tips for travelers to San Diego County during the COVID-19 outbreak?
With new COVID-19 rules and measures in place, travel looks a little different at present. Here's what you need to know before you pack your bags for San Diego County:
  • Find out if any travel restrictions apply to your origin and destination before locking in your flight. Also check if there are any special conditions you'll need to follow on arrival, such as proof of a negative COVID-19 test.
  • Wear a face mask even during airport screening. A TSA employee will ask you to temporarily lower your mask to verify your identity.
  • To reduce the risk of cross-contamination, place your boarding pass on the scanner yourself and then hold it up for inspection. Do not hand your boarding pass directly to a TSA officer.
  • You're allowed to take one container of hand sanitizer up to 12 oz (350 ml) in your hand luggage. This will need to be removed for X-ray scanning.
  • Put any personal items (keys, wallet and phone) in your carry-on instead of a bin to reduce handling during screening.
  • If you're bringing food through the security checkpoint, place it in a clear plastic bag and then into a screening bin. This lessens the likelihood that a TSA agent will need to touch your food container or carry-on bag for inspection.
  • Find out if any travel restrictions apply to your origin and destination before locking in your flight. Also check if there are any special conditions you'll need to follow on arrival, such as proof of a negative COVID-19 test.
  • Wear a face mask even during airport screening. A TSA employee will ask you to temporarily lower your mask to verify your identity.
  • To reduce the risk of cross-contamination, place your boarding pass on the scanner yourself and then hold it up for inspection. Do not hand your boarding pass directly to a TSA officer.
  • You're allowed to take one container of hand sanitizer up to 12 oz (350 ml) in your hand luggage. This will need to be removed for X-ray scanning.
  • Put any personal items (keys, wallet and phone) in your carry-on instead of a bin to reduce handling during screening.
  • If you're bringing food through the security checkpoint, place it in a clear plastic bag and then into a screening bin. This lessens the likelihood that a TSA agent will need to touch your food container or carry-on bag for inspection.
Which airlines fly to San Diego County?
Let American Airlines take you there. This leading carrier runs 759 services each month to San Diego Intl. Airport (SAN), a San Diego County gateway.
How can I find cheap tickets to San Diego County?
Book in advance, travel on a cheaper day, avoid peak travel periods — there's no shortage of ways! Another one is to make use of Expedia's "flexible dates" function. Search for your San Diego County flight, then compare the cheapest prices for nearby dates. In the last seven days, the best price for a flight to San Diego County was HK$3,550.
How much is a flight to San Diego County?
If you were journeying one way from Philadelphia (PHL), you could've scored a bargain seat for just HK$2,598 in the last seven days. Return flights to San Diego County ranged from only HK$3,550 to HK$7,302 over the same period.
What are the most popular airports to fly into in San Diego County?
San Diego Intl. Airport (SAN) is the main gateway for those hoping to explore San Diego County. Around 6709 flights every month touch down at this airport.
When is the cheapest time to fly to San Diego County?
When travelling domestically, fly out on a Saturday to boost your chance of scoring the cheapest airfare. Thursday is often the most expensive day to depart. According to our research, when flying internationally you could save up to 25% on your flight if you choose to leave on a Friday. Sunday is usually the dearest time to fly.
How much is a plane ticket to San Diego County?
In the last seven days, seats to San Diego County ranged between HK$3,550 and HK$7,302. Prices depend on a number of things, particularly the departure time, seating class, airline and when you make your booking.
Which airlines with flights to San Diego County employ COVID-19 cleanliness policies?
As passengers and cabin crew start traveling once again, nearly all airlines have implemented physical distancing and other precautionary measures to help combat COVID-19. Here are just a few examples:
  • Southwest Airlines - this airline is known for providing passenger masks and cleaning with disinfectant.
  • Alaska Airlines - this airline is known for providing passenger masks and cleaning with disinfectant.
  • American Airlines - this airline is known for providing passenger masks and cleaning with disinfectant.
  • Southwest Airlines - this airline is known for providing passenger masks and cleaning with disinfectant.
  • Alaska Airlines - this airline is known for providing passenger masks and cleaning with disinfectant.
  • American Airlines - this airline is known for providing passenger masks and cleaning with disinfectant.
What are the best things to do in San Diego County?
  • Packed with culture, energy and excitement, Carlsbad is an excellent place to kick off your San Diego County adventure. Tour popular attractions like Legoland California, hit up the stores or wine and dine your way around some of this destination's inviting restaurants and bars. What you decide to do is up to you!
  • When selecting what sort of clothes to pack for your trip, take into account that Carlsbad has a mediterranean climate. For a better idea of what to expect, study the weather before you set off.
  • Roughly 14 kilometres to the north of Carlsbad, Oceanside also deserves to be high on your itinerary. Noteworthy sights at this location include Mission San Luis Rey Church — don't forget to drop by.
  • Packed with culture, energy and excitement, Carlsbad is an excellent place to kick off your San Diego County adventure. Tour popular attractions like Legoland California, hit up the stores or wine and dine your way around some of this destination's inviting restaurants and bars. What you decide to do is up to you!
  • When selecting what sort of clothes to pack for your trip, take into account that Carlsbad has a mediterranean climate. For a better idea of what to expect, study the weather before you set off.
  • Roughly 14 kilometres to the north of Carlsbad, Oceanside also deserves to be high on your itinerary. Noteworthy sights at this location include Mission San Luis Rey Church — don't forget to drop by.

Explore a world of travel with Expedia

*Available to Expedia members.