United's Polaris Business Class offers lie-flat seats and Saks Fifth Avenue bedding for restful long-haul travel.
United's Premium Plus offers larger seats, extra legroom, and upgraded meals on international routes.

Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $353 (United Airlines) |
One-way from | $177 (Kiwi.com) |
Popular in | December |
Cheapest in | November |
Average price | $1,095 |
Good round-trip deal | $427 or less |
Good one-way deal | $243 or less |
Fly from
Fly to
Route
Depart
Return
Price
NewarkShannon
EWR - SNN
EWRSNN
Newark
Wed 4/8
10:40 pm-10:15 am
Nonstop6h 35m
Shannon
Wed 4/22
12:30 pm-2:50 pm
Nonstop7h 20m
NewarkShannon
EWR - SNN
EWRSNN
Newark
Mon 4/27
10:40 pm-10:15 am
Nonstop6h 35m
Shannon
Wed 5/6
12:30 pm-2:50 pm
Nonstop7h 20m
NewarkShannon
EWR - SNN
EWRSNN
Newark
Mon 4/27
10:40 pm-10:15 am
Nonstop6h 35m
Shannon
Mon 5/11
12:30 pm-2:50 pm
Nonstop7h 20m
NewarkShannon
EWR - SNN
EWRSNN
Newark
Thu 4/30
10:40 pm-10:15 am
Nonstop6h 35m
Shannon
Fri 5/8
12:30 pm-2:50 pm
Nonstop7h 20m
NewarkShannon
EWR - SNN
EWRSNN
Newark
Thu 4/30
10:40 pm-10:15 am
Nonstop6h 35m
Shannon
Wed 5/6
12:30 pm-2:50 pm
Nonstop7h 20m
NewarkShannon
EWR - SNN
EWRSNN
Newark
Thu 4/30
10:40 pm-10:15 am
Nonstop6h 35m
Shannon
Thu 5/7
12:30 pm-2:50 pm
Nonstop7h 20m
NewarkShannon
EWR - SNN
EWRSNN
Newark
Mon 4/27
10:40 pm-10:15 am
Nonstop6h 35m
Shannon
Sun 5/10
12:30 pm-2:50 pm
Nonstop7h 20m
NewarkShannon
EWR - SNN
EWRSNN
Newark
Thu 4/30
10:40 pm-10:15 am
Nonstop6h 35m
Shannon
Mon 5/4
12:30 pm-2:50 pm
Nonstop7h 20m
BostonShannon
BOS - SNN
BOSSNN
Boston Logan Intl
Wed 1/21
7:25 pm-6:20 am
Nonstop5h 55m
Shannon
Mon 2/2
2:45 pm-4:50 pm
Nonstop7h 05m
BostonShannon
BOS - SNN
BOSSNN
Boston Logan Intl
Fri 2/27
7:25 pm-6:20 am
Nonstop5h 55m
Shannon
Sat 3/7
2:45 pm-4:50 pm
Nonstop7h 05m
Currently, September is the cheapest month in which you can book a flight from USA to Shannon, Clare (average of $292). Flying from USA to Shannon, Clare in June is currently the most expensive (average of $477). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
One of the essential ways to save on airfare from USA to Shannon, Clare is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the afternoon could potentially save you up to 10% on airfare.
About 30% of weekly flights between United States and Shannon have experienced delays in the past year, with the average delay time being 171 minutes.
Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.
Tuesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.
Over the last year, United Airlines have had the lowest number of delays on this route, with just 29% of flights being delayed.
Overall
Crew
Entertainment
Food
Boarding
Comfort
Reviews
Jim,Nov 2025
AVL - ATL
Overall
Crew
Entertainment
Food
Boarding
Comfort
Reviews
Jim,Nov 2025
AVL - ATL
Overall
Crew
Entertainment
Food
Boarding
Comfort
Reviews
Jim,Nov 2025
AVL - ATL
Overall
Crew
Entertainment
Food
Boarding
Comfort
Reviews
Jim,Nov 2025
AVL - ATL
Overall
Crew
Entertainment
Food
Boarding
Comfort
Reviews
Jim,Nov 2025
AVL - ATL
Overall
Crew
Entertainment
Food
Boarding
Comfort
Reviews
Jim,Nov 2025
AVL - ATL
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$244 | Average$781 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$361 | Average$669 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$371 | Average$795 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$377 | Average$709 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$396 | Average$742 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$423 | Average$701 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$565 | Average$817 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$797 | Average$1,069 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$862 | Average$1,478 | FlexibilityNo cancel fee | On-time62% |