$399 Cheap United flights Philadelphia (PHL) to Shannon (SNN)

View $399 flight on Mon, Sep 8, 2025Opens in a new window

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$399 Cheap United flights Philadelphia (PHL) to Shannon (SNN)

Prices were available within the past 7 days and start at $399 for one-way flights and $517 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sun, Sep 7 - Tue, Sep 16
PHL
Philadelphia
SNN
Shannon
$517 Roundtrip, found 5 days ago
$517
Roundtrip
found 5 days ago
Select United flight, departing Sun, Sep 7 from Philadelphia to Shannon, returning Tue, Sep 16, priced at $517 found 5 days ago
United
Sat, Sep 6 - Tue, Sep 16
PHL
Philadelphia
SNN
Shannon
$522 Roundtrip, found 5 days ago
$522
Roundtrip
found 5 days ago
Select United flight, departing Sat, Sep 6 from Philadelphia to Shannon, returning Tue, Sep 16, priced at $522 found 5 days ago
United
Wed, Oct 15 - Wed, Oct 22
PHL
Philadelphia
SNN
Shannon
$532 Roundtrip, found 6 days ago
$532
Roundtrip
found 6 days ago
Select United flight, departing Wed, Oct 15 from Philadelphia to Shannon, returning Wed, Oct 22, priced at $532 found 6 days ago
United
Sun, Sep 14 - Tue, Sep 23
PHL
Philadelphia
SNN
Shannon
$534 Roundtrip, found 4 days ago
$534
Roundtrip
found 4 days ago
Select United flight, departing Sun, Sep 14 from Philadelphia to Shannon, returning Tue, Sep 23, priced at $534 found 4 days ago
United
Sat, Sep 6 - Thu, Sep 18
PHL
Philadelphia
SNN
Shannon
$539 Roundtrip, found 5 hours ago
$539
Roundtrip
found 5 hours ago
Select United flight, departing Sat, Sep 6 from Philadelphia to Shannon, returning Thu, Sep 18, priced at $539 found 5 hours ago
United
Tue, Aug 12 - Fri, Aug 22
PHL
Philadelphia
SNN
Shannon
$544 Roundtrip, found 4 days ago
$544
Roundtrip
found 4 days ago
Select United flight, departing Tue, Aug 12 from Philadelphia to Shannon, returning Fri, Aug 22, priced at $544 found 4 days ago
Flights from Philadelphia (PHL) to Shannon (SNN)
Origin airport
Philadelphia Intl.
Destination airport
Shannon
Airlines serving
Aer Lingus, Air Canada, American Airlines, British Airways, Delta, JetBlue Airways, United
Popular airline
Aer Lingus
Distance
3166 mi

Frequently asked questions

How much is a United Airlines flight from Philadelphia Intl. Airport (PHL) to Shannon Airport (SNN)?
You can discover budget-friendly return United Airlines flights from $517 from PHL to SNN by sorting your results from "Price (lowest to highest)" on Expedia. Or search for bargains from $399 for a one-way trip.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from PHL to SNN with United Airlines?
January is one of the least expensive months to fly to Shannon with United Airlines. You could also find fantastic deals on one-way and round-trip tickets in February.
What is the cheapest time to book flights from Philadelphia Intl. Airport (PHL) to Shannon Airport (SNN) with United Airlines?
To get cheap flights from PHL to SNN with United Airlines, begin your search about one month before your planned departure. You can save 17% when you book your international tickets 18 to 29 days ahead instead of booking four to five months in advance. Another useful tip? Booking on Sunday offers average savings of 17% compared to Friday (the most expensive day).**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does United Airlines fly nonstop from Philadelphia Intl. Airport (PHL) to Shannon Airport (SNN)?
To figure out if there's a direct journey from PHL to SNN with United Airlines or other carriers, check the "Nonstop" filter when browsing for tickets.
What is the earliest United Airlines flight from PHL to SNN?
To find the earliest departure from PHL to SNN with United Airlines, sort your results by "Morning" and "Early Morning." Booking an early flight usually means you'll experience fewer cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does United Airlines fly into in Shannon?
Jump on a United Airlines flight from Philadelphia Intl. Airport (PHL) to Shannon, and you'll likely land at Shannon Airport (SNN). This is the airline's main hub in this destination.
Why fly with United Airlines from PHL to SNN?
A rewarding loyalty program and the ability to collect points through United Mileage Plus are the start of the reasons to jet off from PHL to SNN with United Airlines. Plus, when you join our One Key™ program, you can receive OneKeyCash™* on top of United Airlines's loyalty program earnings. It's yours to spend on future travel plans.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my United Airlines flight from Philadelphia Intl. Airport (PHL) to Shannon Airport (SNN)?
Changes are typically free within 24 hours of booking, but your airline may add a charge after that. For further details about altering your reservation, check out your "Trips," select your flight and click on "Manage Booking." If you want the flexibility to adjust your plans without additional charges, check the "Changes included" or "No cancel fee" filter when organizing your next trip.

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