$556 Cheap American Airlines flights Phoenix (PHX) to Shannon (SNN)

Scoring cheap one-way American Airlines flights from PHX to SNN from $556 on Expedia is a cinch --- just filter by "Price (lowest to highest)." Or check out our budget-friendly round-trip fares from $784 for your next break.**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.

Start your search for American Airlines flights from PHX to SNN about one month before you want to leave. The most affordable time to book an international flight is generally 18 to 29 days ahead of your travel date when you can save 17% versus booking four to five months in advance. Regardless of ticket type or itinerary, the best day of the week to book international airfare is usually Sunday. Friday is often the most expensive. Travelers booking on a Sunday can save an average of 17% compared to those who book on a Friday.**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.

Browse American Airlines's earliest flights from PHX to SNN by selecting our "Morning" and "Early Morning" filters. Not only will you arrive at your destination sooner, early departures are also 20% less likely to be canceled.**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.