Which airline has the best punctuality record on Boston to San Diego flights?

Over the past year, JetBlue have had the lowest number of delays on this route, with just 14% of flights being delayed.

What day of the week experiences the fewest flight delays on this route?

Monday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.

How often are flights from Boston to San Diego delayed?

About 17% of weekly flights between Boston and San Diego have experienced delays in the past year, with the average delay time being 157 minutes.

What is the most punctual flight time for Boston to San Diego flights?

Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.

How popular is this Boston to San Diego flight route?

Flights from Boston Logan Intl to San Diego have been viewed 2 times in the past calendar month.

How long is the flight from Boston to San Diego?

Departing from Boston to San Diego will take you 6h 12m. The distance between Boston and San Diego is about 2581 mi. All flights are typically direct.

Weekly flight availability from Boston to San Diego

The most flights from BOS to SAN are scheduled on a Monday (17 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (9 on average).

In terms of precipitation, rainfall in San Diego ranges from 0.0 - 58.0 inches per month. February is typically the wettest month, when rainfall can reach 58.0 mm. July is typically the driest time to visit San Diego when rainfall is around 0.0 mm.

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 22.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 14.0 C).

What are the most reliable airlines from Boston to San Diego?

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Boston to San Diego on time: Qatar Airways (86%), TAP AIR PORTUGAL (81%), American Airlines (77%).

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

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

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

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

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

Yes. Cheapflights offers flight deals from Boston 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.

£102+ Cheap Flights from Boston to San Diego

Cheap flight deals from Boston to San Diego

Enter your travel dates to find the best prices.

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Cheapest flights from Boston to San Diego
Explore the most affordable flight options available from Boston to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 25 August 2026.

Tue 22/909:05 -

Nonstop5h 55m

Tue 29/915:55 -

Nonstop5h 35m

Deal found 24/8£181

Wed 11/1108:25 -

Nonstop6h 20m

Tue 17/1110:55 -

2 stops9h 45m

Deal found 21/8£185

Fri 25/915:41 -

Nonstop6h 05m

Wed 30/920:27 -

Nonstop5h 55m

Deal found 24/8£188

Sat 26/913:34 -

1 stop10h 56m

Wed 30/906:15 -

1 stop10h 15m

Deal found 24/8£189

Fri 18/917:10 -

Nonstop6h 05m

Tue 13/1021:53 -

Nonstop5h 42m

Deal found 23/8£191

Tue 15/910:38 -

1 stop8h 11m

Tue 22/914:15 -

1 stop7h 55m

Deal found 21/8£192

Fri 25/918:17 -

Nonstop6h 13m

Mon 28/920:59 -

Nonstop5h 48m

Deal found 24/8£196

Sat 7/1109:00 -

1 stop12h 50m

Wed 11/1119:45 -

2 stops9h 20m

Deal found 21/8£197

Tue 15/909:05 -

Nonstop5h 55m

Fri 18/915:55 -

Nonstop5h 35m

Deal found 24/8£198

Wed 16/915:45 -

1 stop8h 39m

Mon 21/914:15 -

1 stop7h 55m

Deal found 21/8£199

Tue 27/1007:51 -

Nonstop6h 18m

Sun 8/1121:07 -

Nonstop5h 39m

Deal found 21/8£201

Find flight deals from Boston to San Diego

Round-trip from	£181
One-way from	£102
Popular in	December
Cheapest in	January
Average price	£280

JetBlue
5/11-10/11
Nonstop
11h 57m total
Boston to San Diego

Search Deals

Delta
4/12
Nonstop
6h 32m total
Boston to San Diego

Search Deals

Highest demand for flights based on searches. 1% potential increase in price (£2 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£6 potential savings vs. average return price).

Search Deals

Average for round-trip flights in August 2026

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Fastest return journey

BostonSan Diego

BOS Boston Logan Intl - SAN San Diego

BOSSAN

Boston Logan Intl

Thu 10/9

11:15-14:10

Nonstop5h 55m

San Diego

Wed 16/9

15:55-00:30

Nonstop5h 35m

£188

BostonSan Diego

BOS Boston Logan Intl - SAN San Diego

BOSSAN

Boston Logan Intl

Fri 30/10

10:50-14:05

Nonstop6h 15m

San Diego

Sun 1/11

21:55-08:05

1 stop7h 10m

£210

BostonSan Diego

BOS Boston Logan Intl - SAN San Diego

BOSSAN

Boston Logan Intl

Wed 21/10

13:15-20:30

1 stop10h 15m

San Diego

Sat 24/10

10:40-23:15

2 stops9h 35m

£214

BostonSan Diego

BOS Boston Logan Intl - SAN San Diego

BOSSAN

Boston Logan Intl

Wed 30/9

16:00-19:07

Nonstop6h 07m

San Diego

Mon 5/10

20:25-05:34

Nonstop6h 09m

£218

BostonSan Diego

BOS Boston Logan Intl - SAN San Diego

BOSSAN

Boston Logan Intl

Thu 7/1

18:14-21:58

Nonstop6h 44m

San Diego

Mon 25/1

06:16-05:40

1 stop20h 24m

£224

BostonSan Diego

BOS Boston Logan Intl - SAN San Diego

BOSSAN

Boston Logan Intl

Thu 10/9

15:55-23:00

1 stop10h 05m

San Diego

Sun 13/9

15:55-00:30

Nonstop5h 35m

£224

BostonSan Diego

BOS Boston Logan Intl - SAN San Diego

BOSSAN

Boston Logan Intl

Sat 17/10

05:35-10:45

1 stop8h 10m

San Diego

Sat 24/10

22:40-12:00

2 stops10h 20m

£236

BostonSan Diego

BOS Boston Logan Intl - SAN San Diego

BOSSAN

Boston Logan Intl

Tue 29/12

22:25-08:30

1 stop13h 05m

San Diego

Tue 5/1

11:25-19:45

Nonstop5h 20m

£237

BostonSan Diego

BOS Boston Logan Intl - SAN San Diego

BOSSAN

Boston Logan Intl

Thu 17/9

19:59-10:46

1 stop17h 47m

San Diego

Sun 20/9

20:59-05:47

Nonstop5h 48m

£247

BostonSan Diego

BOS Boston Logan Intl - SAN San Diego

BOSSAN

Boston Logan Intl

Thu 8/10

22:00-07:50

1 stop12h 50m

San Diego

Mon 12/10

21:15-12:10

1 stop11h 55m

£248

Flights are sorted by cheapest return flights first.

Deals found on 22/8

Showing 1-10 of 23 resultsSorted by cheapest first

Best time to book a flight from Boston to San Diego

Have a flexible travel schedule? Discover the best time to fly to San Diego from Boston with our price prediction graph.

BOS-SAN

Estimated return 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 Boston to San Diego

Prices

Airlines

Delays

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

To ensure you get the cheapest price possible for a flight from Boston to San Diego, you should look to book at least 52 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, January is the cheapest month in which you can book a flight from Boston to San Diego (average of £238). Flying from Boston to San Diego in December is currently the most expensive (average of £345). 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 BOS to SAN?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Boston to San Diego as you normally would.

How much does it cost for a return flight from Boston to San Diego?

Airfare is below average for this route at the moment.

Boston to San Diego flights typically cost between £205 and £349 in September.
The cheapest return price found within the last 5 days was £181 on Southwest (22 Sept–26 Sept).

Related info for your journey

How popular is this Boston to San Diego flight route?
Flights from Boston Logan Intl to San Diego have been viewed 2 times in the past calendar month.
How long is the flight from Boston to San Diego?
Departing from Boston to San Diego will take you 6h 12m. The distance between Boston and San Diego is about 2581 mi. All flights are typically direct.
What are the most reliable airlines from Boston to San Diego?
Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Boston to San Diego on time: Qatar Airways (86%), TAP AIR PORTUGAL (81%), American Airlines (77%).
Can I find deals for flights from Boston to San Diego that include hotel bookings?
Yes. In addition to deals on Boston to San Diego flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Boston to San Diego?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to San Diego.
Can I find deals for business class flights from Boston to San Diego?
Yes. Cheapflights offers flight deals from Boston 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 Boston to San Diego?
Currently, January is the cheapest month in which you can book a flight from Boston to San Diego (average of £238). Flying from Boston to San Diego in December is currently the most expensive (average of £345). 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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When you search for this flight from Boston to San Diego, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Boston to San Diego?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to San Diego from Boston.

Can Cheapflights find flights from Boston to San Diego with no change fees?

Yes, we can. To see specific flights from Boston to San Diego with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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Cheap flights from Boston to San Diego from £102

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 25/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Boston to San Diego

Cheapest flights from Boston to San DiegoExplore the most affordable flight options available from Boston to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 25 August 2026.

Explore the most affordable flight options available from Boston to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 25 August 2026.

Best flights from Boston to San DiegoDiscover carefully curated flight deals from Boston to San Diego that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 25 August 2026.

Discover carefully curated flight deals from Boston to San Diego that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 25 August 2026.

Direct flights from Boston to San DiegoExplore direct flight options from Boston to San Diego based on user searches, and compare prices and availability for your desired travel dates. Data last updated 25 August 2026.

Explore direct flight options from Boston to San Diego based on user searches, and compare prices and availability for your desired travel dates. Data last updated 25 August 2026.

Last-minute flights from Boston to San DiegoDiscover last-minute flight deals from Boston to San Diego. Data last updated 25 August 2026 and is based on user searches.

Discover last-minute flight deals from Boston to San Diego. Data last updated 25 August 2026 and is based on user searches.

One-way flights from Boston to San DiegoSearch for one-way flight options from Boston to San Diego. Find affordable one-way fares based on user searches. Data last updated 25 August 2026.

Search for one-way flight options from Boston to San Diego. Find affordable one-way fares based on user searches. Data last updated 25 August 2026.

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Best time to book a flight from Boston to San Diego

Have a flexible travel schedule? Discover the best time to fly to San Diego from Boston with our price prediction graph.

Cheapflights Insights

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

To ensure you get the cheapest price possible for a flight from Boston to San Diego, you should look to book at least 52 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Boston to San Diego as you normally would.

How much does it cost for a return flight from Boston to San Diego?

Airfare is below average for this route at the moment.

Boston to San Diego flights typically cost between £205 and £349 in September.The cheapest return price found within the last 5 days was £181 on Southwest (22 Sept–26 Sept).

Weekly flight availability from Boston to San Diego

The most flights from BOS to SAN are scheduled on a Monday (17 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (9 on average).

How often are flights from Boston to San Diego delayed?

About 17% of weekly flights between Boston and San Diego have experienced delays in the past year, with the average delay time being 157 minutes.

What is the most punctual flight time for Boston to San Diego flights?

Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Monday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Boston to San Diego flights?

Over the past year, JetBlue have had the lowest number of delays on this route, with just 14% of flights being delayed.

Related info for your journey

How popular is this Boston to San Diego flight route?

How long is the flight from Boston to San Diego?

What are the most reliable airlines from Boston to San Diego?

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

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

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

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

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Can Cheapflights notify me if prices for flights from Boston to San Diego become cheaper?

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Cheapest flights from Boston to San Diego
Explore the most affordable flight options available from Boston to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 25 August 2026.

Best flights from Boston to San Diego
Discover carefully curated flight deals from Boston to San Diego that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 25 August 2026.

Direct flights from Boston to San Diego
Explore direct flight options from Boston to San Diego based on user searches, and compare prices and availability for your desired travel dates. Data last updated 25 August 2026.

Last-minute flights from Boston to San Diego
Discover last-minute flight deals from Boston to San Diego. Data last updated 25 August 2026 and is based on user searches.

One-way flights from Boston to San Diego
Search for one-way flight options from Boston to San Diego. Find affordable one-way fares based on user searches. Data last updated 25 August 2026.

Boston to San Diego flights typically cost between £205 and £349 in September.
The cheapest return price found within the last 5 days was £181 on Southwest (22 Sept–26 Sept).