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

Delta, at $309, was found to be the cheapest airline from Allentown to San Diego.Alternate airlines to your destination round-trip include American Airlines and United Airlines. Delta is 34% cheaper than the average price of flights available within the next 90 days to this destination.

What are the cheapest airlines to fly from Allentown to San Diego one-way?

For one-way options, check prices for United Airlines. According to our data, you can fly for as low as $232. Users have also found prices from $246 and $474 on Delta and American Airlines, respectively.

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.

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.

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

Leaving on a Monday is a viable option for saving on travel. Heavily demanded days of the week can typically drive up the prices you see. Booking your travel for a less competitive day can save up to 28% on the overall cost on flights from Allentown to San Diego.

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

Travelers have found it’s best to book a flight 57 days in advance to save up to 111% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 57 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Allentown to San Diego 1-2 weeks in advance for as low as $483, or $555 for flights within the next 24 hours.

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

Due to multiple factors, expect to potentially pay more when booking in December. For low rates, March can be a great choice for travel to San Diego. Flights to San Diego from Allentown in March are about $474 on average during March, but can be found for as low as $283.

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.

$232+ Flights from Allentown to San Diego

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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Allentown-Bethlehem to San Diego are usually found in March or August, booked 71 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 (Delta)
One-way from	$232 (United Airlines)
Popular in	December
Cheapest in	March
Average price	$343

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

Search Deals

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

Search Deals

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. 16% potential increase in price ($96 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease ($24 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in March 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 March 28, 2025.

Thu 9/41:00 pmABE - SAN

1 stop9h 19mDelta

Tue 9/910:40 pmSAN - ABE

1 stop10h 30mDelta

Deal found 3/27

$309

Wed 4/306:05 amABE - SAN

1 stop10h 46mAmerican Airlines

Tue 5/61:48 pmSAN - ABE

1 stop7h 52mAmerican Airlines

Deal found 3/27

$403

Thu 9/46:44 amABE - SAN

1 stop7h 56mUnited Airlines

Tue 9/96:15 amSAN - ABE

2 stops12h 39mUnited Airlines

Deal found 3/27

$444

Sun 4/63:14 pmABE - SAN

3 stops43h 02mMultiple Airlines

Thu 4/106:15 amSAN - ABE

2 stops28h 58mMultiple Airlines

Deal found 3/27

$450

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 March 28, 2025.

Thu 9/41:00 pmABE - SAN

1 stop9h 19mDelta

Tue 9/910:40 pmSAN - ABE

1 stop10h 30mDelta

Deal found 3/27

$309

Wed 4/306:05 amABE - SAN

1 stop10h 46mAmerican Airlines

Tue 5/61:48 pmSAN - ABE

1 stop7h 52mAmerican Airlines

Deal found 3/27

$403

Thu 9/46:44 amABE - SAN

1 stop7h 56mUnited Airlines

Tue 9/96:15 amSAN - ABE

2 stops12h 39mUnited Airlines

Deal found 3/27

$444

Sun 4/63:14 pmABE - SAN

3 stops43h 02mMultiple Airlines

Thu 4/106:15 amSAN - ABE

2 stops28h 58mMultiple Airlines

Deal found 3/27

$450

Last-minute flights from Allentown to San Diego
Discover last-minute flight deals from Allentown to San Diego. Data last updated March 28, 2025 and is based on user searches.

Tue 4/16:05 amABE - SAN

1 stop10h 25mDelta

Wed 4/96:15 amSAN - ABE

1 stop7h 22mDelta

Deal found 3/27

$499

Tue 4/16:30 amABE - SAN

2 stops13h 45mUnited Airlines

Wed 4/97:00 amSAN - ABE

1 stop6h 57mUnited Airlines

Deal found 3/27

$1,834

Sun 4/63:14 pmABE - SAN

3 stops43h 02mMultiple Airlines

Thu 4/106:15 amSAN - ABE

2 stops28h 58mMultiple Airlines

Deal found 3/27

$450

Sun 4/66:05 amABE - SAN

1 stop7h 53mAmerican Airlines

Thu 4/1010:12 amSAN - ABE

2 stops9h 06mAmerican Airlines

Deal found 3/27

$1,257

Thu 4/176:30 amABE - SAN

1 stop8h 12mUnited Airlines

Sat 4/196:15 amSAN - ABE

2 stops12h 10mUnited Airlines

Deal found 3/27

$556

Tue 4/225:21 pmABE - SAN

1 stop7h 38mDelta

Sat 4/266:15 amSAN - ABE

1 stop7h 26mDelta

Deal found 3/26

$381

Wed 4/306:05 amABE - SAN

1 stop10h 46mAmerican Airlines

Tue 5/61:48 pmSAN - ABE

1 stop7h 52mAmerican Airlines

Deal found 3/27

$403

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 March 28, 2025.

Wed 5/76:37 amABE - SAN

2 stops10h 09mUnited Airlines

Deal found 3/27

$232

Wed 7/95:40 pmABE - SAN

1 stop8h 06mDelta

Deal found 3/27

$246

Tue 4/16:20 amABE - SAN

1 stop7h 50mAmerican Airlines

Deal found 3/27

$474

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

Thu 9/4

1:00 pm-7:19 pm

1 stop9h 19m

San Diego

Tue 9/9

10:40 pm-12:10 pm

1 stop10h 30m

$309

AllentownSan Diego

ABE - SAN

ABESAN

Allentown-Bethlehem

Wed 4/30

6:05 am-1:51 pm

1 stop10h 46m

San Diego

Tue 5/6

1:48 pm-12:40 am

1 stop7h 52m

$403

AllentownSan Diego

ABE - SAN

ABESAN

Allentown-Bethlehem

Thu 9/4

6:44 am-11:40 am

1 stop7h 56m

San Diego

Tue 9/9

6:15 am-9:54 pm

2 stops12h 39m

$444

AllentownSan Diego

ABE - SAN

ABESAN

Allentown-Bethlehem

Sun 4/6

3:14 pm-7:16 am

3 stops43h 02m

San Diego

Thu 4/10

6:15 am-2:13 pm

2 stops28h 58m

$450

AllentownSan Diego

ABE - SAN

ABESAN

Allentown-Bethlehem

Wed 5/7

6:37 am-1:46 pm

2 stops10h 09m

$232

AllentownSan Diego

ABE - SAN

ABESAN

Allentown-Bethlehem

Wed 7/9

5:40 pm-10:46 pm

1 stop8h 06m

$246

AllentownSan Diego

ABE - SAN

ABESAN

Allentown-Bethlehem

Tue 4/1

6:20 am-11:10 am

1 stop7h 50m

$474

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

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 March.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	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.

Rainfall in San Diego by month

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.

Temperature in San Diego by month

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).

Reviews of airlines servicing San Diego

Read reviews from past customers who have flown Delta, United Airlines and American Airlines from Allentown to San Diego. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,896 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

7,896 reviews

Delta

8.0

Very good

7,896 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

8,603 reviews

Delta

8.0

Very good

7,896 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

7,896 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

What are the cheapest airlines flying from Allentown to San Diego round-trip?
Delta, at $309, was found to be the cheapest airline from Allentown to San Diego.Alternate airlines to your destination round-trip include American Airlines and United Airlines. Delta is 34% cheaper than the average price of flights available within the next 90 days to this destination.
What are the cheapest airlines to fly from Allentown to San Diego one-way?
For one-way options, check prices for United Airlines. According to our data, you can fly for as low as $232. Users have also found prices from $246 and $474 on Delta and American Airlines, respectively.
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.

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Other flights to San Diego

Top 3 airlines flying from Allentown to San Diego

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$262	Average$457	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$283	Average$408	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$296	Average$457	FlexibilityNo cancel fee	On-timeN/A

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$232+ 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 5/7. 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 August, booked 71 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 March 28, 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 March 28, 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 March.

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?

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 March 21, 2025.

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?

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 March 28, 2025.

Rainfall in San Diego by month

Plan your trip to San Diego by taking into account the average rainfall totals by month.

Temperature in San Diego by month

Plan your trip to San Diego by taking into account the average temperature totals by month.

Reviews of airlines servicing San Diego

Read reviews from past customers who have flown Delta, United Airlines and American Airlines from Allentown to San Diego. Users have also rated airlines 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.

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

What are the cheapest airlines to fly from Allentown to San Diego one-way?

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?

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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 March 28, 2025.