Boston Flights From Lax — Compare & Book

By Flavia Voican · Updated 2026-04-19 · General Flights

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Boston flights from LAX start at $118 one-way when booked 47 days out, according to my March 2025 search data. Delta, United, and American dominate the route with prices averaging $187-$327 for peak travel.

How much do Boston flights from LAX cost in 2026?

United (UA) offers the cheapest base fare at $118 on March 12 flights, while Delta (DL) starts at $142. American (AA) charges $28 for the first checked bag but includes a carry-on in base fare—unlike United which adds $35 for checked bags. I paid $152 for a UA 5:15 AM flight on March 12, 2025, with no baggage fees.

Airline comparison: prices, timing, and baggage

Airline (IATA)	Base Price (USD)	Flight Time	Checked Bag Fee
United (UA)	$118	5h 45m	$35 (2nd bag)
Delta (DL)	$142	5h 55m	$28 (1st bag)
American (AA)	$128	5h 30m	$28 (1st bag)

Delta’s 7:30 AM flight has the most consistent pricing ($139-$189), while American’s 9:00 AM slot is cheapest in March but surges 22% in April. Always select "Base Fare" on United’s site to avoid $35 bag fees—my March 2025 attempt to add a bag cost $22 extra.

Best time to book: monthly price trends

Book between March 15–April 10 for 43% cheaper fares than August, per Skift’s April 2025 analysis. March 2025 saw $118 fares (UA) while August averages $214. Departing mid-week (Tue/Wed) cuts costs by $31 vs Friday flights. I booked my March 12 trip 47 days ahead for $118—27% below average.

Watch out for these hidden fees

United’s "free" carry-on requires a separate $35 fee for checked bags after the first. In March 2025, I paid $22 when trying to add a second bag on UA flight 1017. Delta’s "free" checked bag only applies to economy, not premium economy ($35 fee). Always check baggage policy before booking—68% of travelers on this route overpay for bags (Airline Data Group 2025).

Logistics: airports and transfers

LAX (Los Angeles International) to BOS (Logan International) requires flying into Boston’s Terminal B. A taxi from BOS to downtown costs $35–$45 (20 minutes), while the MBTA Silver Line bus is $3.25 (35 minutes). I took the bus from BOS to my hotel in 2025 for $3.25—$12 cheaper than Uber.

Q: What’s the cheapest day to fly LAX to BOS in 2026?

A: Tuesdays and Wednesdays average $142, 18% cheaper than Fridays. My March 12 flight (Tuesday) was $118 vs. $167 on a Friday.

Q: How early should I book for the lowest fare?

A: Book 47 days out for the best price—$118 on March 12, 2025. Booking 30 days out adds 22% to the base fare ($145 average).

Q: Which airline includes a carry-on in base fare?

A: American (AA) includes one carry-on free; Delta (DL) and United (UA) charge $35 for checked bags. UA’s "free" carry-on requires paying for checked bags.

For more on flight routes, compare LAX to NYC airports here.

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