Book direct flights from Boston to San Diego: One way flights from $134, round trip flights from $202. Find flight deals for the next 3 months below.

Displayed flight fares from Boston to San Diego are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Trip.com price insights on flights from Boston to San Diego

Which month has the cheapest one-way flights from to San Diego?

The average price of one-way flights from to San Diego purchased by Trip.com users by month over the past 12 months.

Based on Trip.com’s data, the cheapest month for flights from to San Diego is January, with an average price of $212; while the month with the highest flight price is usually April, with an average price of up to $399.

$399
$306
$212
$119
    Cheapest
  • $223
    May
  • $232
    Jun
  • $228
    Jul
  • $246
    Aug
  • $281
    Sep
  • $282
    Oct
  • $285
    Nov
  • $377
    Dec
  • $212
    Jan
  • $340
    Feb
  • $227
    Mar
  • $399
    Apr

When is the cheapest day to fly from Boston to San Diego during Memorial Day?

Data is based on the lowest one-way price from Boston to San Diego during Memorial Day on Trip.com in the past 3 days.

Memorial Day is scheduled for May 25. The cheapest flights from Boston to San Diego are available on May 27, with fares starting at $100.

$333
$217
$100
0
    Cheapest
  • $333
    21
    May
  • $211
    22
  • $214
    23
  • $216
    24
  • $256
    25
  • $256
    26
  • $100
    27

Frequently Asked Questions

  • What are the cheapest flights from Boston to San Diego (BOS-SAN)?

    Based on Trip.com data, American Airlines offers one-way fares as low as $110 on Cheapest nonstop routes (e.g. BOS to SAN on Thu, May 28), while Alaska Airlines offers Cheapest nonstop round-trips from $202 departing on Sat, Jun 6 and returning on Tue, Jun 9.
  • At the moment, you can catch a nonstop flight from Boston to San Diego with the following airlines, including: Jetblue Airways Alaska Airlines Delta Air Lines Hawaiian Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.
  • It takes around 6 hours 25 minutes to fly from Boston (BOS) to San Diego (SAN).
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Boston to San Diego is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • Based on Trip.com data in the past 4 weeks, there is 9 flight per week flying from Boston to San Diego. You can check the weekly schedule for popular airlines on this route below: Jetblue Airways: S/-/-/W/T/-/S -- B6619 (10:43) Alaska Airlines: S/M/T/W/T/F/S -- AS389 (19:41)
  • To find best deals on flights from Boston to San Diego, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Thu, May 28, with one-way flights priced at just $110.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Alaska Airlines.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for San Diego travel is around July.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Boston to San Diego is October, when demand for travel is lower.
  • After crunching the numbers on our May flight calendar, it's currently cheapest to fly from Boston to San Diego on May 27, 2026 with Delta Air Lines, with prices starting at $100.
  • You can land at any one of the following hubs in San Diego, with Boston Logan International Airport to San Diego International Airport (BOS-SAN) is by far the most common option on this route: San Diego International Airport (SAN) McClellan-Palomar Airport (CLD) Marine Corps Air Station Miramar (NKX).
  • The time difference between San Diego and Boston is 3h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

Note: Prices shown on this page are estimated lowest price and include all taxes and fees found in the last 24 hours.

Book with no extra fees

Prices displayed in this page are all-inclusive prices (incl. taxes, fuel surcharge, civil aviation development fund, etc) with all fees confirmed before payment. Fees for luggage, meals, WLAN, or other additional services are also included as shown in the flight cards.

Real-time pricing updates

Prices, availability, and travel information on this page were updated within last 24 hours—even in real-time. The more popular the route, the more precise the data.

Change & Cancellation Policy

Trip.com displays flight cancellation and change policies for each flight ticket during the booking process, including fees and applicable conditions. Please check the following scenarios:
Voluntary cancellation/change:
To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy.
Cancellation/change due to a flight schedule change:
If the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.