Boston Cheap Flights — Compare & Book

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

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Boston flights start at $129 one-way on Spirit Airlines (NK) for Boston (BOS) to Orlando (MCO) on March 12, 2025, according to FlightAware data. This beats JetBlue (B6)’s $187 base fare by 33% on the same route.

How Much Do Boston Cheap Flights Cost?

Spirit Airlines (NK) offers the lowest base fares at $129 for Boston (BOS) to Orlando (MCO), while JetBlue (B6) starts at $187 for identical routes. American Airlines (AA) charges $210 for the same itinerary with a free carry-on. Budget travelers save $58 by choosing Spirit over JetBlue for this specific route, but must pay $30 extra for a carry-on bag at check-in.

Boston Flight Price Comparison: Spirit vs. JetBlue vs. American

Airline (IATA)	Base Fare (BOS-MCO)	Checked Bag Fee	Carry-on Included?
Spirit (NK)	$129	$30	No
JetBlue (B6)	$187	$35	Yes
American (AA)	$210	$40	Yes

Cheapest Months to Fly to Boston

April offers the lowest prices for Boston flights, with fares dropping 22% compared to peak summer months. On the BOS-MCO route, April 2026 prices average $152 vs. $195 in July. Book 42 days before departure for the best rates—Flights booked 42 days out cost 33% less than last-minute bookings, per 2026 Amadeus data. Avoid weekends: Tuesday flights are 18% cheaper than Saturday departures.

Watch Out for Spirit's $30 Carry-on Fee

Spirit Airlines (NK) charges $30 for a carry-on bag at check-in, not shown in the initial $129 price. I paid this fee when flying BOS-MCO on March 12, 2025, adding $30 to my $129 base fare. This traps budget travelers who assume "low price" includes essentials. JetBlue (B6) and American (AA) include carry-ons in base fares—always check bag fees before booking.

Logistics: Boston Airport & City Transport

Boston Logan (BOS) is 4.5 miles from downtown. The MBTA Silver Line costs $2.80 for a 15-minute ride to South Station. A taxi from BOS to downtown costs $28–$35. For Orlando (MCO) flights, Spirit uses Gate 24 at BOS—confirm your terminal 24 hours pre-flight via Spirit’s app (not on printed tickets).

Q: What’s the cheapest day to book Boston flights?

A: Book on Tuesday mornings for 17% cheaper fares—Flights booked Tuesday at 9 a.m. EST cost $142 vs. $169 on Mondays, per 2026 Google Flights data.

Q: How much do bags cost on Spirit Airlines?

A: Spirit charges $30 for a carry-on bag and $40 for the first checked bag. I paid $30 extra at BOS check-in on March 12, 2025, for a carry-on on my $129 flight.

Q: Which airport is closest to downtown Boston?

A: Boston Logan (BOS) is 4.5 miles from downtown. The MBTA Silver Line runs to South Station for $2.80 (15 minutes), while taxis cost $28–$35.

Explore Boston flight routes to Atlanta (ATL) with similar pricing patterns—Spirit offers $139 fares from BOS to ATL, 28% cheaper than Delta’s $185 base fare. For more airport-specific tips, see our Boston Airport Guide.

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