How often are flights from Boston to San Diego delayed?

About 18% of weekly flights between Boston and San Diego have experienced delays in the past year, with the average delay time being 158 minutes.

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.

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

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

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

Over the past year, JetBlue has had the lowest number of delays on this route, with just 15% of flights being delayed.

How popular is this Boston to San Diego flight route?

The Boston Logan Intl to San Diego flight path was viewed by 1 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

How long is the flight from Boston to San Diego?

There are many flights that can get you from Boston to San Diego in 6h 18m. Fly via Southwest, Alaska Airlines, or JetBlue to get the fastest option. Boston and San Diego are separated by a distance of 4154 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

Weekly flight availability from Boston to San Diego

The most flights from BOS to SAN are scheduled on a Friday (12 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (3 on average).

In terms of precipitation, rainfall in San Diego ranges from 0.0 - 58.0 mm 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?

No one likes to see their flight delayed. When booking a flight from Boston to San Diego consider choosing TAP AIR PORTUGAL (78%), American Airlines (76%) or Alaska Airlines (76%) as they are the most reliable in getting you off to your destination on time.

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 vacation 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.

C$ 196+ Cheap Flights from Boston to San Diego

Cheap flight deals from Boston to San Diego

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

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 20 September 2026.

Fri 13/111:05 p.m. -

1 stop10h 17m

Mon 16/119:40 p.m. -

1 stop10h 01m

Deal found 17/9C$ 357

Thu 26/111:05 p.m. -

1 stop8h 10m

Sat 5/129:05 a.m. -

2 stops9h 55m

Deal found 17/9C$ 358

Sat 14/118:00 a.m. -

Nonstop6h 25m

Tue 17/1111:25 a.m. -

Nonstop5h 25m

Deal found 18/9C$ 359

Wed 2/125:00 a.m. -

2 stops9h 25m

Fri 4/126:35 a.m. -

1 stop7h 15m

Deal found 16/9C$ 361

Wed 28/109:30 a.m. -

Nonstop6h 26m

Wed 4/119:40 p.m. -

1 stop10h 01m

Deal found 17/9C$ 362

Fri 23/101:12 p.m. -

1 stop9h 44m

Mon 26/109:40 p.m. -

1 stop10h 01m

Deal found 19/9C$ 364

Wed 28/101:00 p.m. -

1 stop10h 25m

Sat 31/1012:33 p.m. -

1 stop8h 16m

Deal found 18/9C$ 365

Sat 31/107:20 a.m. -

1 stop11h 55m

Wed 4/1111:25 a.m. -

Nonstop5h 25m

Deal found 17/9C$ 366

Thu 15/1010:00 p.m. -

1 stop12h 50m

Tue 20/1010:40 p.m. -

1 stop7h 55m

Deal found 16/9C$ 368

Wed 21/107:00 a.m. -

Nonstop6h 09m

Tue 27/109:40 p.m. -

1 stop10h 01m

Deal found 16/9C$ 369

Thu 29/105:35 a.m. -

1 stop9h 45m

Thu 29/102:10 p.m. -

1 stop8h 05m

Deal found 16/9C$ 371

Mon 23/114:10 p.m. -

Nonstop6h 26m

Tue 24/1110:50 a.m. -

1 stop10h 32m

Deal found 17/9C$ 372

Find flight deals from Boston to San Diego

Round-trip from	C$ 357
One-way from	C$ 196
Popular in	December
Cheapest in	January
Average price	C$ 541

JetBlue
13/11-16/11
2 total stops
20h 18m total
Boston to San Diego

Search Deals

Southwest
4/12-31/12
1 total stop
8h 25m total
Boston to San Diego

Search Deals

Highest demand for flights based on searches. 1% potential increase in price (C$ 13 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (C$ 17 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonSan Diego

BOS Boston Logan Intl - SAN San Diego

BOSSAN

Boston Logan Intl

Tue 3/11

5:10 a.m.-11:50 a.m.

2 stops9h 40m

San Diego

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 201

BostonSan Diego

BOS Boston Logan Intl - SAN San Diego

BOSSAN

Boston Logan Intl

Thu 12/11

10:10 a.m.-4:55 p.m.

2 stops9h 45m

San Diego

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 215

BostonSan Diego

BOS Boston Logan Intl - SAN San Diego

BOSSAN

Boston Logan Intl

Wed 11/11

5:10 a.m.-11:50 a.m.

2 stops9h 40m

San Diego

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 215

BostonSan Diego

BOS Boston Logan Intl - SAN San Diego

BOSSAN

Boston Logan Intl

Mon 16/11

5:10 a.m.-11:50 a.m.

2 stops9h 40m

San Diego

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 215

BostonSan Diego

BOS Boston Logan Intl - SAN San Diego

BOSSAN

Boston Logan Intl

Mon 26/10

7:55 a.m.-3:04 p.m.

1 stop10h 09m

San Diego

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 217

BostonSan Diego

BOS Boston Logan Intl - SAN San Diego

BOSSAN

Boston Logan Intl

Sat 21/11

6:24 p.m.-9:59 p.m.

Nonstop6h 35m

San Diego

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 250

Quickest round-trip

BostonSan Diego

BOS Boston Logan Intl - SAN San Diego

BOSSAN

Boston Logan Intl

Mon 26/10

6:14 p.m.-9:35 p.m.

Nonstop6h 21m

San Diego

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 254

BostonSan Diego

BOS Boston Logan Intl - SAN San Diego

BOSSAN

Boston Logan Intl

Wed 7/10

10:36 a.m.-8:08 p.m.

2 stops12h 32m

San Diego

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 263

BostonSan Diego

BOS Boston Logan Intl - SAN San Diego

BOSSAN

Boston Logan Intl

Sat 31/10

10:35 a.m.-6:05 p.m.

2 stops10h 30m

San Diego

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 271

BostonSan Diego

BOS Boston Logan Intl - SAN San Diego

BOSSAN

Boston Logan Intl

Thu 29/10

10:07 a.m.-5:28 p.m.

1 stop10h 21m

San Diego

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 278

Flights are sorted by cheapest round-trip flights first.

Deals found on 19/9

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 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 Boston to San Diego

Prices

Airlines

Delays

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

The best time to book flights from Boston to San Diego is 87 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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 C$ 452). Flying from Boston to San Diego in December is currently the most expensive (average of C$ 656). 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?

When flying from Boston to San Diego, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

Airfare is below average for this route at the moment.

Boston to San Diego flights typically cost between C$ 396 and C$ 690 in November.
The cheapest round-trip price found within the last 5 days was C$ 357 on JetBlue (13 Nov-16 Nov).

Related info for your journey

How popular is this Boston to San Diego flight route?
The Boston Logan Intl to San Diego flight path was viewed by 1 users in the past month. Keep an eye out for changes in search interest prior to high and low season.
How long is the flight from Boston to San Diego?
There are many flights that can get you from Boston to San Diego in 6h 18m. Fly via Southwest, Alaska Airlines, or JetBlue to get the fastest option. Boston and San Diego are separated by a distance of 4154 km. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
What are the most reliable airlines from Boston to San Diego?
No one likes to see their flight delayed. When booking a flight from Boston to San Diego consider choosing TAP AIR PORTUGAL (78%), American Airlines (76%) or Alaska Airlines (76%) as they are the most reliable in getting you off to your destination on time.
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 vacation 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 C$ 452). Flying from Boston to San Diego in December is currently the most expensive (average of C$ 656). 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

El Cajon

La Mesa

Borrego Springs

Browse thousands of different options on Cheapflights for your next trip

Alternative routes

Complete your trip

Direct flights to California

Flights by cabin class

Other flight options

Other flights from Boston

Popular flights

San Diego flight routes

Alternative routes for Boston to San Diego

Boston to Las Vegas flights

Boston to Los Angeles flights

Boston to San Francisco flights

Fly with Cheapflights

How does Cheapflights help users find flights from Boston to San Diego?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Boston to San Diego. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

Cheapflights simply makes it quick and affordable to book flights from Boston to San Diego by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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.

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

Of course! You can now track prices for flights from Boston to San Diego and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from Boston to San Diego from C$ 196

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/12. 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 20 September 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 20 September 2026.

Best flights from Boston to San DiegoDiscover carefully curated flight deals from Boston to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 20 September 2026.

Discover carefully curated flight deals from Boston to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 20 September 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 20 September 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 20 September 2026.

Last-minute flights from Boston to San DiegoDiscover last-minute flight deals from Boston to San Diego. Data last updated 20 September 2026 and is based on user searches.

Discover last-minute flight deals from Boston to San Diego. Data last updated 20 September 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 20 September 2026.

Search for one-way flight options from Boston to San Diego. Find affordable one-way fares based on user searches. Data last updated 20 September 2026.

Find flight deals from Boston to San Diego

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

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

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?

The best time to book flights from Boston to San Diego is 87 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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?

When flying from Boston to San Diego, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

Airfare is below average for this route at the moment.

Boston to San Diego flights typically cost between C$ 396 and C$ 690 in November.The cheapest round-trip price found within the last 5 days was C$ 357 on JetBlue (13 Nov-16 Nov).

Weekly flight availability from Boston to San Diego

The most flights from BOS to SAN are scheduled on a Friday (12 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (3 on average).

How often are flights from Boston to San Diego delayed?

About 18% of weekly flights between Boston and San Diego have experienced delays in the past year, with the average delay time being 158 minutes.

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

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the early afternoon 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 has had the lowest number of delays on this route, with just 15% 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?

Travelling to a place near San Diego?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Boston to San Diego

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to San Diego by adding a car rental and/or hotel reservation to your travel itinerary.

Direct flights to California

Book a non-stop flight to one of these other cities located in California.

Search flights from Boston to San Diego by cabin class

Find flights from Boston to San Diego, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Boston and San Diego flights

Browse other Boston and San Diego flight options. Last updated on 20 September 2026.

Other flights from Boston

Browse through other flights departing from Boston. Flights are based on user searches made on Cheapflights and were last updated on 20 September 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Other flights to San Diego

Explore flights to San Diego departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 20 September 2026.

Fly with Cheapflights

How does Cheapflights help users find flights from Boston to San Diego?

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

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

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

100% Free

Book with Flexibility

Travel Smart

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 20 September 2026.

Best flights from Boston to San Diego
Discover carefully curated flight deals from Boston to San Diego that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 20 September 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 20 September 2026.

Last-minute flights from Boston to San Diego
Discover last-minute flight deals from Boston to San Diego. Data last updated 20 September 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 20 September 2026.

Boston to San Diego flights typically cost between C$ 396 and C$ 690 in November.
The cheapest round-trip price found within the last 5 days was C$ 357 on JetBlue (13 Nov-16 Nov).