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 | $209 (Kiwi.com) |
Popular in | December |
Cheapest in | November |
Average price | $1,031 |
Good round-trip deal | $405 or less |
Good one-way deal | $338 or less |
Fly from
Fly to
Route
Depart
Return
Price
NewarkShannon
EWR - SNN
EWRSNN
Newark
mar. 4/21
10:40 pm-10:15 am
Nonstop6h 35m
Shannon
dom. 4/26
12:30 pm-2:50 pm
Nonstop7h 20m
BostonShannon
BOS - SNN
BOSSNN
Boston Logan Intl
mar. 3/3
7:25 pm-6:20 am
Nonstop5h 55m
Shannon
mar. 3/24
2:45 pm-5:50 pm
Nonstop7h 05m
NewarkShannon
EWR - SNN
EWRSNN
Newark
lun. 4/6
10:40 pm-10:15 am
Nonstop6h 35m
Shannon
lun. 4/20
12:30 pm-2:50 pm
Nonstop7h 20m
BostonShannon
BOS - SNN
BOSSNN
Boston Logan Intl
lun. 4/6
5:25 pm-10:15 am
1 stop11h 50m
Shannon
lun. 4/13
12:30 pm-6:19 pm
1 stop10h 49m
BostonShannon
BOS - SNN
BOSSNN
Boston Logan Intl
lun. 4/20
8:15 pm-10:15 am
1 stop9h 00m
Shannon
lun. 4/27
12:30 pm-10:33 am
2 stops27h 03m
BostonShannon
BOS - SNN
BOSSNN
Boston Logan Intl
lun. 4/6
9:30 am-10:15 am
2 stops19h 45m
Shannon
lun. 4/20
12:30 pm-8:03 pm
1 stop12h 33m
BostonShannon
BOS - SNN
BOSSNN
Boston Logan Intl
mié. 4/15
9:30 am-10:15 am
2 stops19h 45m
Shannon
lun. 4/20
12:30 pm-8:03 pm
1 stop12h 33m
NewarkShannon
EWR - SNN
EWRSNN
Newark
lun. 4/27
10:40 pm-10:15 am
Nonstop6h 35m
Shannon
mar. 6/2
9:30 am-11:34 pm
2 stops19h 04m
NewarkShannon
EWR - SNN
EWRSNN
Newark
mié. 4/8
1:40 pm-11:20 am
2 stops16h 40m
Shannon
mié. 4/22
7:40 am-7:25 pm
1 stop16h 45m
NewarkShannon
EWR - SNN
EWRSNN
Newark
jue. 4/16
10:40 pm-10:15 am
Nonstop6h 35m
Shannon
mar. 4/21
12:30 pm-2:50 pm
Nonstop7h 20m
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 $475). 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 evening could potentially save you up to 14% on airfare.
Travelers seeking maximum savings on their USA to Shannon, Clare flight should consider departing on Tuesday evenings when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
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.
Boarding
Entertainment
Food
Comfort
Crew
Overall
Reviews
Jim,Nov 2025
AVL - ATL
Boarding
Entertainment
Food
Comfort
Crew
Overall
Reviews
Jim,Nov 2025
AVL - ATL
Boarding
Entertainment
Food
Comfort
Crew
Overall
Reviews
Jim,Nov 2025
AVL - ATL
Boarding
Entertainment
Food
Comfort
Crew
Overall
Reviews
Jim,Nov 2025
AVL - ATL
Boarding
Entertainment
Food
Comfort
Crew
Overall
Reviews
Jim,Nov 2025
AVL - ATL
Boarding
Entertainment
Food
Comfort
Crew
Overall
Reviews
Jim,Nov 2025
AVL - ATL
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$244 | Average$773 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$361 | Average$672 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$373 | Average$788 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$377 | Average$708 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$396 | Average$718 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$423 | Average$701 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$592 | Average$856 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$670 | Average$907 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$842 | Average$1,359 | FlexibilityNo cancel fee | On-time62% |