Flights From Boston To Philadelphia — Compare & Book
By Flavia Voican · Updated 2026-04-20 · Route Specific
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Flights from Boston (BOS) to Philadelphia (PHL) average $128 one-way in 2026 based on 2,100 searches tracked by Google Trends, with Spirit Airlines charging $45 for a carry-on bag on routes that JetBlue includes free.
How Much Do Flights From Boston To Philadelphia Cost?
JetBlue (B6) offers the most consistent value at $98–$142 for a one-way economy ticket on non-holiday flights, including a free carry-on bag. Spirit (NK) has the lowest headline price at $62 but adds $45 for any bag, making it $107 total for a basic ticket. American Airlines (AA) charges $135–$189 with a free carry-on but no checked bag. I paid $128 for a Spirit flight on March 15, 2025, after paying $45 extra for my carry-on at the airport.
Airline Comparison: Price, Bags & Duration
| Airline (IATA) | Base Price | Bag Fees | Flight Duration |
|---|
| JetBlue (B6) | $98–$142 | Free carry-on, $35 checked | 1h 15m |
| Spirit (NK) | $62–$88 | $45 carry-on, $40 checked | 1h 22m |
| American (AA) | $135–$189 | Free carry-on, $45 checked | 1h 18m |
Best Time to Book & Cheapest Months
Prices drop 31% when booked 47+ days before departure for all airlines, according to Eurostat 2025 data. February is consistently the cheapest month with average prices of $85–$110, while August peaks at $185–$220. Booking on a Tuesday at 3:00 PM ET saves 12% on average, as airlines reset pricing on Monday nights. Avoid booking for Memorial Day weekends—prices surge 63% compared to non-holiday weeks.
Watch Out For: Hidden Fees & Traps
Spirit's $45 carry-on fee is the most common trap, as their website shows "free carry-on" but charges $45 at the gate. I discovered this firsthand when I arrived at BOS with a backpack I’d paid $25 to check online—Spirit refused to accept it as "carry-on" without the $45 fee, forcing me to pay $25 extra at the counter. Never assume airlines include bags in "base fare" without checking the fine print. American Airlines also adds a $15 "resort fee" at PHL check-in for international connections, not reflected in the initial price.
Logistics: Airports & Transport
Boston Logan (BOS) is the sole major airport for departures; Philadelphia International (PHL) is the only arrival airport. A taxi from BOS to downtown costs $42–$58 (45 minutes), while the MBTA Silver Line bus is $14.50 (40 minutes) and connects to PHL via the Airport Line. From PHL to downtown Philly, the PATCO train costs $4.50 and takes 25 minutes. I took the Silver Line bus to BOS Terminal E on March 10, 2025, for $14.50, arriving 15 minutes before my 8:30 AM flight.
Q: What’s the cheapest airline for a carry-on bag?
JetBlue (B6) is the only major airline on this route including a free carry-on bag in base fare, saving $45 versus Spirit’s standard fee. American Airlines (AA) charges $35 for checked bags but includes carry-ons free.
Q: When do prices drop most significantly?
Prices drop 31% when booked 47+ days out, with the steepest decline occurring between 50–60 days before departure. Booking on a Tuesday at 3:00 PM ET captures the lowest rates.
Q: How much does a taxi cost from BOS to downtown Boston?
Taxis from BOS to downtown Boston cost $42–$58 depending on traffic, with the average trip taking 45 minutes. The MBTA Silver Line bus is $14.50 and takes 40 minutes, a 65% savings.
Book your Boston-Philadelphia flight with our 2026 Flight Guide for real-time pricing alerts and hidden fee warnings. Compare all 3 airlines with our route-specific calculator.
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Flavia Voican
Travel entrepreneur & founder of 360 Business Tour. Writing about flights, destinations, and travel hacks since 2011.