How long is the flight from Allentown to San Diego?

There are many flights that can get you from Allentown to San Diego in 8h 10m. Fly via Delta or United Airlines to get the fastest option. The distance from Allentown to San Diego is about 2353 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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.

What is the cheapest day to fly from Allentown to San Diego?

Travelers seeking maximum savings on their Allentown to San Diego flight should consider departing on Thursday afternoons when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in San Diego ranges from 0.0 - 2.3 inches per month. February is typically the wettest month, when rainfall can reach 2.3 in. July is typically the driest time to visit San Diego when rainfall is around 0.0 in.

If weather is an important factor for your trip to San Diego, use this chart to help with planning. For those seeking warmer temperatures, August is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 57.2 F).

What are the most popular airlines that fly from Allentown to San Diego?

American Airlines, Delta and United Airlines are the most popular airlines when flying from Allentown to San Diego.

Most accurate provider : When it comes to deals on Allentown-San Diego flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Allentown-San Diego flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Allentown-San Diego flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Allentown-San Diego flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Allentown-San Diego flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

$219+ Flights from Allentown to San Diego

Q: How much does it cost to fly round-trip from Allentown to San Diego?

Airfare is below average for this route at the moment. Allentown to San Diego flights typically cost between $420 and $564 in February. The cheapest round-trip price found within the last 3 days was $356 on Delta (Feb 21-Feb 25).

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1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

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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

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$309 (American Airlines)
One-way from	$219 (Delta)
Popular in	December
Cheapest in	March
Average price	$408

Provider with most accurate pricing for Allentown-Bethlehem-San Diego flight deals.

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Provider most trusted by Cheapflights users for Allentown-Bethlehem-San Diego flights.

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From Allentown-Bethlehem to San Diego

Search Deals

One-way flight from Allentown-Bethlehem to San Diego

Search Deals

Highest demand for flights based on searches. 17% potential increase in price ($104 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 6% potential price decrease ($30 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 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 September 25, 2025.

Sun 10/56:30 amABE - SAN

1 stop8h 10mUnited Airlines

Sat 10/116:48 amSAN - ABE

1 stop7h 05mUnited Airlines

Deal found 9/24

$414

Sat 11/81:00 pmABE - SAN

1 stop8h 52mUnited Airlines

Tue 11/118:40 pmSAN - ABE

2 stops12h 08mUnited Airlines

Deal found 9/24

$478

Sat 9/271:00 pmABE - SAN

1 stop8h 30mUnited Airlines

Wed 10/810:30 pmSAN - ABE

1 stop9h 08mUnited Airlines

Deal found 9/25

$497

Fri 9/261:00 pmABE - SAN

1 stop8h 30mUnited Airlines

Wed 10/810:30 pmSAN - ABE

1 stop9h 08mUnited Airlines

Deal found 9/25

$499

Tue 10/71:00 pmABE - SAN

1 stop8h 30mUnited Airlines

Tue 10/1410:30 pmSAN - ABE

1 stop9h 08mUnited Airlines

Deal found 9/24

$514

Sun 10/57:30 amABE - SAN

1 stop30h 39mMultiple Airlines

Sun 10/127:23 pmSAN - ABE

2 stops35h 03mMultiple Airlines

Deal found 9/24

$515

Best flights from Allentown to San Diego
Discover carefully curated flight deals from Allentown to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 25, 2025.

Sat 2/215:40 pmABE - SAN

1 stop8h 31mDelta

Wed 2/256:20 amSAN - ABE

1 stop7h 53mDelta

Deal found 9/23

$356

Sun 10/56:30 amABE - SAN

1 stop8h 10mUnited Airlines

Sat 10/116:48 amSAN - ABE

1 stop7h 05mUnited Airlines

Deal found 9/24

$414

Sat 11/81:00 pmABE - SAN

1 stop8h 52mUnited Airlines

Tue 11/118:40 pmSAN - ABE

2 stops12h 08mUnited Airlines

Deal found 9/24

$478

Sat 11/85:22 pmABE - SAN

1 stop7h 58mUnited Airlines

Sat 11/159:00 amSAN - ABE

2 stops9h 41mUnited Airlines

Deal found 9/24

$519

Sat 2/2110:33 amABE - SAN

2 stops16h 08mUnited Airlines

Wed 2/257:00 amSAN - ABE

2 stops11h 47mUnited Airlines

Deal found 9/23

$524

Tue 10/71:00 pmABE - SAN

2 stops9h 52mUnited Airlines

Tue 10/147:28 pmSAN - ABE

2 stops12h 10mUnited Airlines

Deal found 9/24

$524

Sun 10/56:30 amABE - SAN

1 stop8h 10mUnited Airlines

Sun 10/1210:30 pmSAN - ABE

1 stop9h 08mUnited Airlines

Deal found 9/24

$577

Last-minute flights from Allentown to San Diego
Discover last-minute flight deals from Allentown to San Diego. Data last updated September 25, 2025 and is based on user searches.

Fri 9/261:00 pmABE - SAN

1 stop8h 30mUnited Airlines

Wed 10/810:30 pmSAN - ABE

1 stop9h 08mUnited Airlines

Deal found 9/25

$499

Sat 9/271:00 pmABE - SAN

1 stop8h 30mUnited Airlines

Wed 10/810:30 pmSAN - ABE

1 stop9h 08mUnited Airlines

Deal found 9/25

$497

Sun 10/56:30 amABE - SAN

1 stop8h 10mUnited Airlines

Sat 10/116:48 amSAN - ABE

1 stop7h 05mUnited Airlines

Deal found 9/24

$414

Sun 10/57:30 amABE - SAN

1 stop30h 39mMultiple Airlines

Sun 10/127:23 pmSAN - ABE

2 stops35h 03mMultiple Airlines

Deal found 9/24

$515

Tue 10/71:00 pmABE - SAN

1 stop8h 30mUnited Airlines

Tue 10/1410:30 pmSAN - ABE

1 stop9h 08mUnited Airlines

Deal found 9/24

$514

One-way flights from Allentown to San Diego
Search for one-way flight options from Allentown to San Diego. Find affordable one-way fares based on user searches. Data last updated September 25, 2025.

Tue 11/46:00 pmABE - SAN

1 stop8h 14mDelta

Deal found 9/25

$219

Thu 2/196:30 amABE - SAN

1 stop9h 48mDelta

Deal found 9/25

$233

Tue 12/26:00 pmABE - SAN

1 stop8h 46mDelta

Deal found 9/25

$290

Tue 9/3012:48 pmABE - SAN

1 stop8h 22mDelta

Deal found 9/25

$332

Tue 12/21:46 pmABE - SAN

2 stops11h 06mAmerican Airlines

Deal found 9/24

$335

Mon 12/110:39 amABE - SAN

3 stops53h 51mMultiple Airlines

Deal found 9/24

$385

Tue 9/301:00 pmABE - SAN

2 stops12h 27mUnited Airlines

Deal found 9/25

$387

Tue 12/25:22 pmABE - SAN

3 stops22h 42mUnited Airlines

Deal found 9/25

$530

Mon 12/16:00 pmABE - SAN

1 stop8h 43mDelta

Deal found 9/25

$570

Mon 12/15:22 pmABE - SAN

1 stop19h 18mUnited Airlines

Deal found 9/25

$612

Mon 10/131:00 pmABE - SAN

1 stop8h 30mUnited Airlines

Deal found 9/25

$696

Cheapflights Fare Finder

Use the filters below to find and compare flights from Allentown to San Diego that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

AllentownSan Diego

ABE - SAN

ABESAN

Allentown-Bethlehem

Sat 2/21

5:40 pm-11:11 pm

1 stop8h 31m

San Diego

Wed 2/25

6:20 am-5:13 pm

1 stop7h 53m

$356

AllentownSan Diego

ABE - SAN

ABESAN

Allentown-Bethlehem

Sun 10/5

6:30 am-11:40 am

1 stop8h 10m

San Diego

Sat 10/11

6:48 am-4:53 pm

1 stop7h 05m

$414

AllentownSan Diego

ABE - SAN

ABESAN

Allentown-Bethlehem

Sat 11/8

1:00 pm-6:52 pm

1 stop8h 52m

San Diego

Tue 11/11

8:40 pm-11:48 am

2 stops12h 08m

$478

AllentownSan Diego

ABE - SAN

ABESAN

Allentown-Bethlehem

Sat 11/8

5:22 pm-10:20 pm

1 stop7h 58m

San Diego

Sat 11/15

9:00 am-9:41 pm

2 stops9h 41m

$519

AllentownSan Diego

ABE - SAN

ABESAN

Allentown-Bethlehem

Sat 2/21

10:33 am-11:41 pm

2 stops16h 08m

San Diego

Wed 2/25

7:00 am-9:47 pm

2 stops11h 47m

$524

AllentownSan Diego

ABE - SAN

ABESAN

Allentown-Bethlehem

Tue 10/7

1:00 pm-7:52 pm

2 stops9h 52m

San Diego

Tue 10/14

7:28 pm-10:38 am

2 stops12h 10m

$524

AllentownSan Diego

ABE - SAN

ABESAN

Allentown-Bethlehem

Sun 10/5

6:30 am-11:40 am

1 stop8h 10m

San Diego

Sun 10/12

10:30 pm-10:38 am

1 stop9h 08m

$577

AllentownSan Diego

ABE - SAN

ABESAN

Allentown-Bethlehem

Wed 11/5

6:00 pm-11:14 pm

1 stop8h 14m

$219

AllentownSan Diego

ABE - SAN

ABESAN

Allentown-Bethlehem

Thu 2/19

6:30 am-1:18 pm

1 stop9h 48m

$233

AllentownSan Diego

ABE - SAN

ABESAN

Allentown-Bethlehem

Tue 12/2

6:00 pm-11:46 pm

1 stop8h 46m

$290

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/25

Showing 1-10 of 16 results

Compare providers for flights from Allentown to San Diego

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Allentown to San Diego in September.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Allentown-San Diego flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Allentown-San Diego flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Allentown-San Diego flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Allentown-San Diego flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Allentown-San Diego flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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?

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?

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.

How much does it cost to fly round-trip from Allentown to San Diego?

Reviews of airlines servicing San Diego

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

7,973 reviews

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

7,973 reviews

Delta

8.0

Very good

7,973 reviews

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

8,926 reviews

Delta

8.0

Very good

7,973 reviews

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

7,973 reviews

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

How long is the flight from Allentown to San Diego?
There are many flights that can get you from Allentown to San Diego in 8h 10m. Fly via Delta or United Airlines to get the fastest option. The distance from Allentown to San Diego is about 2353 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.
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

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Other flights to San Diego

Top 3 airlines flying from Allentown to San Diego

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$283	Average$400	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$308	Average$477	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$402	Average$539	FlexibilityNo cancel fee	On-time71%

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$219+ 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 11/5. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Allentown to San Diego with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Allentown to San Diego

Cheapest flights from Allentown to San DiegoExplore 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 September 25, 2025.

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 September 25, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Allentown to San Diego that are best for you.

Compare providers for flights from Allentown to San Diego

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Allentown to San Diego in September.

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.

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?

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

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

How much does it cost to fly round-trip from Allentown to San Diego?

Reviews of airlines servicing San Diego

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.

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.

How long is the flight from Allentown to San Diego?

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

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

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

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

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

Traveling to a place near San Diego?

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Alternative routes for Allentown to San Diego

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Top 3 airlines flying from Allentown to San Diego

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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 September 25, 2025.