PHL - ALO

$555 Find Cheap Flights from Philadelphia to Waterloo

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Philadelphia to Waterloo departing on 5/21. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Waterloo

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to Waterloo, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to Waterloo, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$555
American Airlines
Thu 5/21Mon 5/25
PHL - ALO • 1 stop
Cheapest one-way
Multiple Airlines
Wed 1/28
PHL - ALO • multi-stop
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Waterloo!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Philadelphia to Waterloo (PHL-ALO)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Philadelphia to Waterloo 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.

Recent round-trip flight deals from Philadelphia to Waterloo

Thu, May 21 - Mon, May 25
American Airlines Logo
8:30 am - 2:39 pm
PHL
-
ALO
7h 09m
1 stop
American Airlines Logo
3:09 pm - 9:56 pm
ALO
-
PHL
5h 47m
1 stop
$555American Airlines
Thu, May 21 - Mon, May 25
American Airlines Logo
7:44 pm - 11:59 pm
PHL
-
ALO
5h 15m
1 stop
American Airlines Logo
3:09 pm - 12:09 am
ALO
-
PHL
8h 00m
2 stops
$560American Airlines
Thu, May 21 - Mon, May 25
American Airlines Logo
8:20 am - 2:39 pm
PHL
-
ALO
7h 19m
2 stops
American Airlines Logo
3:09 pm - 12:09 am
ALO
-
PHL
8h 00m
2 stops
$565American Airlines
Wed, Jun 17 - Wed, Jun 24
American Airlines Logo
10:35 am - 2:39 pm
PHL
-
ALO
5h 04m
1 stop
American Airlines Logo
3:09 pm - 8:23 pm
ALO
-
PHL
4h 14m
1 stop
$725American Airlines
Wed, Jun 17 - Wed, Jun 24
American Airlines Logo
10:35 am - 2:39 pm
PHL
-
ALO
5h 04m
1 stop
American Airlines Logo
5:00 am - 2:37 pm
ALO
-
PHL
8h 37m
2 stops
$817American Airlines
Wed, Jun 17 - Wed, Jun 24
American Airlines Logo
4:12 pm - 11:59 pm
PHL
-
ALO
8h 47m
2 stops
American Airlines Logo
5:00 am - 2:37 pm
ALO
-
PHL
8h 37m
2 stops
$909American Airlines
Wed, Jun 17 - Wed, Jun 24
American Airlines Logo
8:46 am - 2:39 pm
PHL
-
ALO
6h 53m
2 stops
American Airlines Logo
5:00 am - 2:37 pm
ALO
-
PHL
8h 37m
2 stops
$910American Airlines
Booking Insights

Good to know

Cheapest flight$555
Flight from Philadelphia to Waterloo

When to book flights from Philadelphia to Waterloo

Are your dates flexible? Find out the best times to travel from Philadelphia to Waterloo based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Philadelphia to Waterloo

  • What is the cheapest flight from Philadelphia to Waterloo?

    In the last 3 days, the lowest price for a flight from Philadelphia to Waterloo was $555 for a round-trip ticket.

  • Do I need a passport to fly between Philadelphia and Waterloo?

    No

  • Which aircraft models fly most regularly from Philadelphia to Waterloo?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Philadelphia to Waterloo?

    oneworld is the only airline alliance operating flights between Philadelphia and Waterloo.

  • How does KAYAK find such low prices on flights from Philadelphia to Waterloo?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Philadelphia to Waterloo.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Philadelphia to Waterloo?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Waterloo from Philadelphia is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Philadelphia to Waterloo?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Waterloo with an airline and back to Philadelphia with another airline. Booking your flights between Philadelphia and ALO can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Philadelphia to Waterloo?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Waterloo from Philadelphia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Philadelphia to Waterloo

 
See real verified KAYAK customer reviews for airlines flying from Philadelphia to Waterloo. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Philadelphia to Waterloo? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.2
American AirlinesOverall score based on 11201 reviews
7.2Comfort
8.0Crew
7.5Boarding
6.9Entertainment
6.4Food
Airline reviews

This flight captain and crew were amazing, started ahead of time of departure and reached 30 mins before arrival time. Amazing!

10.0 ExcellentFatima, Jan 2026
PHL - STL
Read more American Airlines reviews

This flight captain and crew were amazing, started ahead of time of departure and reached 30 mins before arrival time. Amazing!

Long delays, lack of information about the status of the flight. The flight was delayed 4 times.

Everything about the flight was lovely. My only suggestion would be to offer a few more options of tv series from Apple TV or HBO.

The boarding by groups is pointless. The first two groups worked fine, but almost Noone boarded in goups three thru five leaving the vast majority boarding when group six was called. It defeated the purpose of spreading out the crowd.

Delays to take off and to leave the plane after landing added a lot of time to this flight.

The Phildalphia to Allentown portion was a BUS, not a plane. All was as expected.

Excellent - explanations were clear staff was nice and flight was comfortable

Flight was delayed not sure why no explanation given and no apologies either. Otherwise the flight was fine

Did not get the seat I selected and paid for.

Plane was delayed for 6 hours, at first by weather, which is understandable, but was further delayed with NO given reason for 2 1/2 hours more. We had no clue when we were going to depart actually until they opened the ramp. VERY POOR to ZERO COMMUNICATION!!!

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

Information on your arrival and departure airports

Philadelphia (PHL)
Waterloo (ALO)