What is the cheapest United Airlines flight from Boston to Philadelphia?

In the last 3 days, the lowest price for a flight with United Airlines from Boston to Philadelphia was $135 for a return flight and $59 for a one-way flight.

Does United Airlines fly direct to Philadelphia from Boston?

No, United Airlines does not fly the route directly.

$79 Cheap United Airlines Flights from Boston to Philadelphia

Flight Deals

Cheap United Airlines Flight Deals from Boston to Philadelphia

Here are some of the best deals found on KAYAK recently from United Airlines for round-trip flights from Boston to Philadelphia that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Recent round-trip United Airlines flight deals from Boston to Philadelphia

Thu, Jan 15 - Fri, Jan 16

5:45 am - 9:37 am

BOS

PHL

3h 52m1 stop

7:45 pm - 11:49 pm

PHL

BOS

4h 04m1 stop

$157United Airlines

Mon, Jan 5 - Wed, Jan 7

5:20 am - 9:55 am

BOS

PHL

4h 35m1 stop

10:30 am - 2:17 pm

PHL

BOS

3h 47m1 stop

$167United Airlines

Fri, Jan 9 - Sun, Jan 11

9:30 am - 2:10 pm

BOS

PHL

4h 40m1 stop

7:45 pm - 11:49 pm

PHL

BOS

4h 04m1 stop

$174United Airlines

Mon, Jan 5 - Tue, Jan 6

5:20 am - 9:55 am

BOS

PHL

4h 35m1 stop

10:30 am - 2:17 pm

PHL

BOS

3h 47m1 stop

$177United Airlines

Fri, Jan 9 - Sun, Jan 11

9:30 am - 2:10 pm

BOS

PHL

4h 40m1 stop

7:45 pm - 11:49 pm

PHL

BOS

4h 04m1 stop

$178United Airlines

Wed, Dec 31 - Wed, Jan 7

5:20 am - 9:55 am

BOS

PHL

4h 35m1 stop

10:30 am - 2:17 pm

PHL

BOS

3h 47m1 stop

$192United Airlines

Tue, Jan 6 - Wed, Jan 7

9:30 am - 2:10 pm

BOS

PHL

4h 40m1 stop

7:45 pm - 11:49 pm

PHL

BOS

4h 04m1 stop

$194United Airlines

Fri, Jan 2 - Sun, Jan 11

5:20 am - 9:55 am

BOS

PHL

4h 35m1 stop

7:45 pm - 11:49 pm

PHL

BOS

4h 04m1 stop

$207United Airlines

Tue, Jan 13 - Wed, Jan 14

9:30 am - 2:10 pm

BOS

PHL

4h 40m1 stop

7:45 pm - 11:49 pm

PHL

BOS

4h 04m1 stop

$214United Airlines

Tue, Jan 6 - Mon, Jan 12

6:00 am - 2:31 pm

BOS

PHL

8h 31m1 stop

7:45 pm - 11:49 pm

PHL

BOS

4h 04m1 stop

$217United Airlines

Useful Info

Cheapest flight	$79

Flight from Boston to Philadelphia

When to Book Flights with United Airlines from Boston to Philadelphia

Average price per month

Flight prices as travel date approaches

What is the cheapest United Airlines flight from Boston to Philadelphia?
In the last 3 days, the lowest price for a flight with United Airlines from Boston to Philadelphia was $135 for a return flight and $59 for a one-way flight.
Does United Airlines fly direct to Philadelphia from Boston?
No, United Airlines does not fly the route directly.

7.4

Good9,096 verified ratings

8.1Crew

6.6Food

7.7Boarding

7.1Entertainment

7.3Comfort

Pros +

Flight was quick and easy. (in 2447 reviews)
"Clean plane, organized crew." (in 2084 reviews)

Show reviews that mention

2.0 Poor

Derrick, Dec 2025

MCO

EWR

Very turbulent trip made it pretty bearable, plus the lack of refreshments served and the lack of any air conditioning before takeoff which took an hour or more.

2.0 Poor

Mukund, Dec 2025

DEN

SFO

Flight was late - I was downgraded from first class to coach

2.0 Poor

Mukund, Dec 2025

GRR

DEN

Not good - outbound flight was delayed and missed my connection even though I got to the gate after running through the airport - the agent would not let me on because the door was closed (flight had not left). There was no notification from United - overall experience was very disappointing. Additionally, I was downgraded from first class to coach on the alternative flight

10.0 Wonderful

Tony, Dec 2025

IAD

RDU

Great 👍🏼

10.0 Wonderful

Tony, Dec 2025

CUN

IAD

Great flight….would fly with them again👍🏼

2.0 Poor

Sally, Dec 2025

LGA

DEN

It was 11 hours DELAYED BOARDED AND RE BOARDED 3 times

10.0 Wonderful

Roger, Dec 2025

CAE

ORD

The flight was on time. I generally don’t drink or eat on short flights and the seats were good and the flight attendants were friendly. That’s all I expect

6.0 Okay

Sue, Dec 2025

SJO

SFO

Movie selection is good. Crew did not understand mileage program and were no help. Sick later. Food?

10.0 Wonderful

Bill, Dec 2025

LHR

IAH

Staff on board was excellent. Positive upbeat helpful- like it used to be.

8.0 Very good

Eurico Hiromitsu, Dec 2025

ORD

GRU

Razoavel

Everything you need to know for your flight from Boston to Philadelphia

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BOS - PHL

$79 Find Cheap United Airlines Flights from Boston to Philadelphia

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Cheap United Airlines Flight Deals from Boston to Philadelphia

Recent round-trip United Airlines flight deals from Boston to Philadelphia

Recent one-way United Airlines flight deals from Boston to Philadelphia

Recent last minute United Airlines flight deals from Boston to Philadelphia

Good to know

When to Book Flights with United Airlines from Boston to Philadelphia

FAQs for flying to Philadelphia with United Airlines

What is the cheapest United Airlines flight from Boston to Philadelphia?

In the last 3 days, the lowest price for a flight with United Airlines from Boston to Philadelphia was $135 for a return flight and $59 for a one-way flight.

Does United Airlines fly direct to Philadelphia from Boston?

No, United Airlines does not fly the route directly.

United Airlines Customer Reviews

Pros +

Traveler rating:

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Everything you need to know for your flight from Boston to Philadelphia

Other airlines flying from Boston to Philadelphia

Flight deals from the most popular airlines with KAYAK users flying the route

Cabin class types available on flights to Philadelphia

Cabin classes available on flights to Boston. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

Complete your trip to Philadelphia with a hotel stay or car rental

Flights to other popular destinations

The most popular flights on KAYAK according to clicks in the last 2 weeks. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

Find deals for your return flight

Top United Airlines flights

The most popular destinations for flights with United Airlines according to clicks from KAYAK users. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.