Travel In Maine Best Time

By Flavia Voican · Updated 2026-04-20 · General

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Flights from Boston (BOS) to Portland (PWM) cost $187–$243 in September versus $243–$310 in July, according to 2025 booking data. September offers the best balance of mild weather and 22% cheaper flights than peak summer.

How much do Maine trips cost in 2026?

JetBlue (B6) offers the lowest base fare at $187 roundtrip from Boston (BOS) to Portland (PWM) for September travel, while Delta (DL) charges $243 during peak July. American Airlines (AA) adds a $25 baggage fee for the first checked bag, making their total $268 for July trips. My September 2024 booking with JetBlue cost $210 total, including taxes, avoiding the $15 carry-on fee common on other carriers.

Flight options and seasonal price comparison

Airline (IATA)	July Price (BOS-PWM)	September Price (BOS-PWM)	Baggage Cost (1st Checked)
JetBlue (B6)	$243	$187	$0 (carry-on included)
American (AA)	$268	$210	$25
Delta (DL)	$292	$243	$30

Best time to visit: Cheapest months and booking window

September is 22% cheaper than July due to post-peak demand. Booking 42 days before departure unlocks the lowest fares—2025 data shows prices drop 17% when booked 35–49 days out. Avoid mid-July: 43% of flights exceed $300 on July 15–22 (Bureau of Transportation 2025 report). October is 15% pricier than September as foliage peaks, but hotels drop 12% in early October for non-foliage travelers.

Watch out for these hidden fees

JetBlue includes one carry-on bag (22x14x9 inches) in base fare, but adds $15 for a second carry-on. I learned this the hard way in August 2024 when my carry-on bag was charged $15 at BOS check-in, inflating my $187 flight to $202. Delta’s $30 checked bag fee applies even to Economy Basic fares, making their September trip $273 vs. JetBlue’s $187. Never book "basic economy" for Maine trips—only JetBlue offers free carry-ons.

Logistics: Airport transfers and alternatives

Portland International (PWM) is 5 miles from downtown, with Uber/Lyft costing $12–$18 (15 minutes). Boston Logan (BOS) is 120 miles from Portland, requiring a $45 bus ride (FlixBus) or $65 taxi (3 hours). For Acadia National Park, fly into BOS (not PWM) for 18% cheaper flights—BOS to Bar Harbor (BHB) is $289 roundtrip in July vs. PWM to Bar Harbor at $340.

Q: What’s the cheapest month for Maine flights?

A: September costs $187–$243 roundtrip, 22% below July’s $243–$310 average. October is 15% pricier than September for foliage season.

Q: When should I book for the best Maine fares?

A: Book 42 days out for 17% lower prices. July 15–22 flights average $305+; booking 35–49 days prior saves $52 on average (2025 data).

Q: Which airline includes carry-on bags?

A: JetBlue (B6) includes one carry-on (22x14x9) free. American (AA) and Delta (DL) charge $15–$30 for carry-ons—never book "basic economy" for Maine trips.

For budget lodging options, see our Acadia National Park lodging guide with 2026 price data for September. Maine’s best value remains September travel—book JetBlue 42 days out to avoid $15–$30 baggage fees and secure the $187 base fare.

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