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 | $346 (Mytrip) |
One-way from | $139 (Mytrip) |
Popular in | December |
Cheapest in | November |
Average price | $499 |
Good round-trip deal | $416 or less |
Good one-way deal | $268 or less |
Fly from
Fly to
Route
Depart
Return
Price
BostonShannon
BOS - SNN
BOSSNN
Boston Logan Intl
Fri 4/24
7:34 pm-10:15 am
2 stops33h 41m
Shannon
Fri 5/1
12:30 pm-6:13 pm
1 stop10h 43m
BostonShannon
BOS - SNN
BOSSNN
Boston Logan Intl
Sat 4/25
7:34 pm-10:15 am
2 stops33h 41m
Shannon
Sat 5/2
12:30 pm-6:13 pm
1 stop10h 43m
BostonShannon
BOS - SNN
BOSSNN
Boston Logan Intl
Tue 5/5
10:44 am-10:15 am
2 stops18h 31m
Shannon
Wed 5/13
12:30 pm-6:13 pm
1 stop10h 43m
BostonShannon
BOS - SNN
BOSSNN
Boston Logan Intl
Sat 4/25
3:28 pm-10:15 am
1 stop13h 47m
Shannon
Sat 5/2
12:00 pm-3:55 pm
1 stop32h 55m
New YorkShannon
JFK - SNN
JFKSNN
New York John F Kennedy Intl
Fri 3/6
6:50 pm-3:45 pm
1 stop15h 55m
Shannon
Sat 3/14
7:50 am-7:40 pm
1 stop15h 50m
New YorkShannon
JFK - SNN
JFKSNN
New York John F Kennedy Intl
Fri 3/13
9:05 pm-11:30 am
1 stop10h 25m
Shannon
Wed 3/18
7:50 am-8:35 pm
1 stop16h 45m
BostonShannon
BOS - SNN
BOSSNN
Boston Logan Intl
Fri 1/16
7:30 am-3:45 pm
1 stop27h 15m
Shannon
Thu 1/22
7:50 am-7:45 pm
1 stop16h 55m
BostonShannon
BOS - SNN
BOSSNN
Boston Logan Intl
Tue 5/5
9:30 am-10:15 am
2 stops19h 45m
Shannon
Mon 5/18
12:30 pm-6:13 pm
1 stop10h 43m
BostonShannon
BOS - SNN
BOSSNN
Boston Logan Intl
Sat 4/4
9:50 pm-8:35 pm
1 stop17h 45m
Shannon
Thu 4/9
9:15 pm-1:35 pm
1 stop21h 20m
NewarkShannon
EWR - SNN
EWRSNN
Newark
Tue 12/2
1:44 pm-11:30 am
2 stops16h 46m
Shannon
Sun 12/14
7:50 am-10:41 pm
2 stops19h 51m
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 13% 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.
Crew
Overall
Food
Comfort
Boarding
Entertainment
Reviews
Jim,Nov 2025
AVL - ATL
Crew
Overall
Food
Comfort
Boarding
Entertainment
Reviews
Jim,Nov 2025
AVL - ATL
Crew
Overall
Food
Comfort
Boarding
Entertainment
Reviews
Jim,Nov 2025
AVL - ATL
Crew
Overall
Food
Comfort
Boarding
Entertainment
Reviews
Jim,Nov 2025
AVL - ATL
Crew
Overall
Food
Comfort
Boarding
Entertainment
Reviews
Jim,Nov 2025
AVL - ATL
Crew
Overall
Food
Comfort
Boarding
Entertainment
Reviews
Jim,Nov 2025
AVL - ATL
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$244 | Average$774 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$361 | Average$688 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$377 | Average$708 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$378 | Average$796 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$396 | Average$726 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$423 | Average$701 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$592 | Average$851 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$670 | Average$956 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$791 | Average$1,016 | FlexibilityNo cancel fee | On-time62% |