$375 Cheap United flights Denver (DEN) to Shannon (SNN)

View $375 flight on Sun, Aug 17, 2025Opens in a new window

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$375 Cheap United flights Denver (DEN) to Shannon (SNN)

Prices were available within the past 7 days and start at $375 for one-way flights and $510 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Fri, Apr 24 - Sat, May 2
DEN
Denver
SNN
Shannon
$510 Roundtrip, found 3 days ago
$510
Roundtrip
found 3 days ago
Select United flight, departing Fri, Apr 24 from Denver to Shannon, returning Sat, May 2, priced at $510 found 3 days ago
United
Sat, Sep 6 - Sat, Sep 13
DEN
Denver
SNN
Shannon
$517 Roundtrip, found 8 hours ago
$517
Roundtrip
found 8 hours ago
Select United flight, departing Sat, Sep 6 from Denver to Shannon, returning Sat, Sep 13, priced at $517 found 8 hours ago
United
Sat, Sep 6 - Sat, Sep 13
DEN
Denver
SNN
Shannon
$521 Roundtrip, found 8 hours ago
$521
Roundtrip
found 8 hours ago
Select United flight, departing Sat, Sep 6 from Denver to Shannon, returning Sat, Sep 13, priced at $521 found 8 hours ago
United
Fri, Sep 12 - Sat, Sep 20
DEN
Denver
SNN
Shannon
$522 Roundtrip, found 10 hours ago
$522
Roundtrip
found 10 hours ago
Select United flight, departing Fri, Sep 12 from Denver to Shannon, returning Sat, Sep 20, priced at $522 found 10 hours ago
United
Fri, Aug 22 - Sun, Sep 7
DEN
Denver
SNN
Shannon
$528 Roundtrip, found 1 day ago
$528
Roundtrip
found 1 day ago
Select United flight, departing Fri, Aug 22 from Denver to Shannon, returning Sun, Sep 7, priced at $528 found 1 day ago
United
Mon, Sep 8 - Mon, Sep 15
DEN
Denver
SNN
Shannon
$528 Roundtrip, found 6 days ago
$528
Roundtrip
found 6 days ago
Select United flight, departing Mon, Sep 8 from Denver to Shannon, returning Mon, Sep 15, priced at $528 found 6 days ago
Flights from Denver (DEN) to Shannon (SNN)
Origin airport
Denver Intl.
Destination airport
Shannon
Airlines serving
Aer Lingus, Air Canada, American Airlines, British Airways, Delta, JetBlue Airways, Lufthansa, United
Popular airline
British Airways
Distance
4312 mi

Frequently asked questions

How much is a United Airlines flight from Denver Intl. Airport (DEN) to Shannon Airport (SNN)?
You can find cheap round-trip United Airlines flights from $510 from DEN to SNN by sorting your results from "Price (lowest to highest)" on Expedia. Or look for deals from $375 for a one-way journey.**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 DEN to SNN with United Airlines?
United Airlines flights to Shannon are often more affordable in the low-season months of January and February. Whether you're searching for a round-trip or one-way ticket, you could find a better deal then.
What is the cheapest time to book flights from Denver Intl. Airport (DEN) to Shannon Airport (SNN) with United Airlines?
To find affordable flights from DEN 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 Denver Intl. Airport (DEN) to Shannon Airport (SNN)?
To figure out if there's a direct route from DEN to SNN with United Airlines or any other carriers, check the "Nonstop" filter when looking for flights.
What is the earliest United Airlines flight from DEN to SNN?
Find United Airlines's earliest flights from DEN to SNN by selecting the "Morning" and "Early Morning" filters. Not only will you get to where you're going sooner, early departures also have a 20% less chance of being 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.
What airports does United Airlines fly into in Shannon?
United Airlines flights from Denver Intl. Airport (DEN) to Shannon touch down at Shannon Airport (SNN). This is the main entry point to this destination.
Why fly with United Airlines from DEN to SNN?
Journey from DEN to SNN with United Airlines and enjoy a host of benefits including a rewarding loyalty program. When you book through Expedia as a United Mileage Plus and One Key™ member, you may also earn OneKeyCash™* to redeem on select future travel purchases.*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 Denver Intl. Airport (DEN) to Shannon Airport (SNN)?
Changes are often free within 24 hours of making your booking, but your airline may charge a fee after that time. For more details about altering your flights, go to your "Trips," select your flight and click on "Manage Booking." If you want the freedom to update your itinerary without additional charges, tick the "Changes included" and "No cancel fee" filters when organizing your next trip.

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*Available to One Key members.