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$149+ Cheap flights from Allentown to San Diego (ABE - SAN)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/4. Fares are subject to change and may not be available on all flights or dates of travel.
ABE — SAN
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheapflights Tip: The best prices from Allentown-Bethlehem to San Diego are usually found in March or September, booked 69 days in advance, depart on a Tuesday or Monday and return on a Thursday

Cheap flight deals from Allentown to San Diego

Discover tips and strategies to find the most affordable flight options for your journey from Allentown (ABE) to San Diego (SAN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 14, 2025.

Round-trip from

$332
(United Airlines)

One-way from

$149
(Delta)

Popular in

December

Cheapest in

March

Average price

$452
From Allentown-Bethlehem to San Diego
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One-way flight from Allentown-Bethlehem to San Diego
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Highest demand for flights based on searches. 18% potential increase in price ($114 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($21 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Allentown to San Diego

Cheapest flights from Allentown to San Diego
Explore the most affordable flight options available from Allentown to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

This United Airlines deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/105:28 pmABE - SAN
1 stop7h 34mUnited Airlines
Fri 9/1210:30 pmSAN - ABE
1 stop9h 07mUnited Airlines
Deal found 8/12$283
This United Airlines deal was found by Cheapflights users on 8/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/41:00 pmABE - SAN
1 stop8h 20mUnited Airlines
Tue 9/97:21 pmSAN - ABE
2 stops13h 37mUnited Airlines
Deal found 8/13$332
This United Airlines deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/271:00 pmABE - SAN
1 stop8h 20mUnited Airlines
Sun 8/3110:41 amSAN - ABE
1 stop8h 13mUnited Airlines
Deal found 8/11$369
This Delta deal was found by Cheapflights users on 8/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/246:00 pmABE - SAN
1 stop8h 14mDelta
Wed 10/2911:00 amSAN - ABE
1 stop8h 15mDelta
Deal found 8/11$382
This American Airlines deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/132:52 pmABE - SAN
1 stop7h 59mAmerican Airlines
Wed 9/176:20 amSAN - ABE
2 stops12h 45mAmerican Airlines
Deal found 8/12$386
This United Airlines deal was found by Cheapflights users on 8/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/261:00 pmABE - SAN
1 stop8h 20mUnited Airlines
Tue 9/28:37 pmSAN - ABE
2 stops12h 21mUnited Airlines
Deal found 8/12$403

Cheapflights Fare Finder

 
Customize your flight search to find flights from Allentown to San Diego that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 14, 2025.
Use the filters below to find and compare flights from Allentown to San Diego that are best for you.

Fly from

Allentown

Fly to

San Diego

Route

Depart

Return

Price

AllentownSan Diego

ABE - SAN

ABESAN

Allentown-Bethlehem

Wed 9/10

5:28 pm-10:02 pm

1 stop7h 34m

San Diego

Fri 9/12

10:30 pm-10:37 am

1 stop9h 07m

$283

AllentownSan Diego

ABE - SAN

ABESAN

Allentown-Bethlehem

Thu 9/4

1:00 pm-6:20 pm

1 stop8h 20m

San Diego

Tue 9/9

7:21 pm-11:58 am

2 stops13h 37m

$332

AllentownSan Diego

ABE - SAN

ABESAN

Allentown-Bethlehem

Wed 8/27

1:00 pm-6:20 pm

1 stop8h 20m

San Diego

Sun 8/31

10:41 am-9:54 pm

1 stop8h 13m

$369

AllentownSan Diego

ABE - SAN

ABESAN

Allentown-Bethlehem

Fri 10/24

6:00 pm-11:14 pm

1 stop8h 14m

San Diego

Wed 10/29

11:00 am-10:15 pm

1 stop8h 15m

$382

AllentownSan Diego

ABE - SAN

ABESAN

Allentown-Bethlehem

Sat 9/13

2:52 pm-7:51 pm

1 stop7h 59m

San Diego

Wed 9/17

6:20 am-10:05 pm

2 stops12h 45m

$386

AllentownSan Diego

ABE - SAN

ABESAN

Allentown-Bethlehem

Tue 11/4

6:00 pm-11:14 pm

1 stop8h 14m

$149

AllentownSan Diego

ABE - SAN

ABESAN

Allentown-Bethlehem

Tue 11/4

1:46 pm-10:20 pm

2 stops11h 34m

$185

AllentownSan Diego

ABE - SAN

ABESAN

Allentown-Bethlehem

Fri 8/29

7:00 am-5:56 pm

3 stops37h 56m

$240

AllentownSan Diego

ABE - SAN

ABESAN

Allentown-Bethlehem

Fri 8/29

6:37 am-11:40 am

1 stop8h 03m

$289

AllentownSan Diego

ABE - SAN

ABESAN

Allentown-Bethlehem

Tue 11/4

10:16 am-6:09 pm

3 stops34h 53m

$545

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/11

Showing 1-10 of 11 results
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Best time to book a flight from Allentown to San Diego

Have a flexible travel schedule? Discover the best time to fly to San Diego from Allentown with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Allentown to San Diego

How far ahead should I book a flight from Allentown to San Diego?

Use this chart to determine the optimal time to book a round-trip flight from Allentown to San Diego. Price data was last updated on August 8, 2025.

The price you pay for your flight from Allentown to San Diego may vary depending on when you book. For the best chance of a lower fare, look to book 69 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Allentown to San Diego?

Currently, August is the cheapest month in which you can book a flight from Allentown to San Diego (average of $286). Flying from Allentown to San Diego in March is currently the most expensive (average of $366). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ABE to SAN?

Find hourly flight availability from Allentown to San Diego. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 14, 2025.

It’s typically best to fly out from Allentown to San Diego in the afternoon. Doing so could potentially save you 43% on the flight price compared to flying at noon, which is usually more expensive.

Reviews of airlines servicing San Diego

Get insights into the airlines that provide service to San Diego. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Diego. Reviews last updated August 14, 2025.
See what other customers who have flown with Delta, United Airlines, and American Airlines from Allentown to San Diego have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,916 reviews
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,980 reviews

Overall

8.0

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Allentown to San Diego. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Allentown to San Diego round-trip?

    United Airlines, at $283, was found to be the cheapest airline from Allentown to San Diego.Alternate airlines to your destination round-trip include Delta and American Airlines. United Airlines is 42% cheaper than the average price of flights available within the next 90 days to this destination.

  • Can I find deals for flights from Allentown to San Diego that include hotel bookings?

    Yes. In addition to deals on Allentown to San Diego flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Allentown to San Diego?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Allentown to San Diego.

  • Can I find deals for business class flights from Allentown to San Diego?

    Yes. Cheapflights offers flight deals from Allentown to San Diego by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Allentown to San Diego?

    Currently, August is the cheapest month in which you can book a flight from Allentown to San Diego (average of $286). Flying from Allentown to San Diego in March is currently the most expensive (average of $366). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
El Cajon
Chula Vista
Coronado
La Mesa
Poway
National City
Lemon Grove
Imperial Beach
Alpine

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Top 3 airlines flying from Allentown to San Diego

Discover the top 3 airlines that operate flights from Allentown to San Diego. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$283Average$400FlexibilityNo cancel feeOn-time69%
DeltaCheapest$308Average$467FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$363Average$540FlexibilityNo cancel feeOn-time71%

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