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 | $215 (Kiwi.com) |
Popular in | December |
Cheapest in | November |
Average price | $1,126 |
Good round-trip deal | $405 or less |
Good one-way deal | $311 or less |
Fly from
Fly to
Route
Depart
Return
Price
BostonShannon
BOS - SNN
BOSSNN
Boston Logan Intl
Wed 1/7
7:25 pm-6:20 am
Nonstop5h 55m
Shannon
Wed 1/14
2:45 pm-4:50 pm
Nonstop7h 05m
New YorkShannon
JFK - SNN
JFKSNN
New York John F Kennedy Intl
Thu 1/15
6:25 pm-4:45 pm
1 stop17h 20m
Shannon
Mon 1/26
7:50 am-7:15 pm
2 stops16h 25m
New YorkShannon
JFK - SNN
JFKSNN
New York John F Kennedy Intl
Wed 1/14
9:50 pm-4:45 pm
1 stop13h 55m
Shannon
Mon 1/19
7:50 am-8:05 pm
1 stop17h 15m
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
BostonShannon
BOS - SNN
BOSSNN
Boston Logan Intl
Fri 1/16
7:15 pm-11:30 am
1 stop11h 15m
Shannon
Tue 1/20
7:50 am-2:20 pm
1 stop11h 30m
New YorkShannon
JFK - SNN
JFKSNN
New York John F Kennedy Intl
Fri 1/16
6:25 pm-3:45 pm
1 stop16h 20m
Shannon
Mon 1/19
7:50 am-9:00 pm
2 stops18h 10m
CharlotteShannon
CLT - SNN
CLTSNN
Charlotte Douglas
Wed 2/25
8:25 pm-4:45 pm
1 stop15h 20m
Shannon
Tue 3/10
7:50 am-5:05 pm
1 stop13h 15m
SeattleShannon
SEA - SNN
SEASNN
Seattle/Tacoma Intl
Sun 3/1
7:15 am-11:30 am
2 stops20h 15m
Shannon
Tue 3/10
7:50 am-5:55 pm
1 stop17h 05m
BostonShannon
BOS - SNN
BOSSNN
Boston Logan Intl
Thu 1/8
7:15 pm-11:30 am
1 stop11h 15m
Shannon
Wed 1/14
7:50 am-7:33 pm
2 stops16h 43m
NewarkShannon
EWR - SNN
EWRSNN
Newark
Tue 1/13
7:36 pm-4:45 pm
2 stops16h 09m
Shannon
Tue 1/20
7:50 am-8:27 pm
2 stops17h 37m
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 afternoon could potentially save you up to 10% 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. Friday mornings 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.
Comfort
Crew
Overall
Entertainment
Food
Boarding
Reviews
Jim,Nov 2025
AVL - ATL
Comfort
Crew
Overall
Entertainment
Food
Boarding
Reviews
Jim,Nov 2025
AVL - ATL
Comfort
Crew
Overall
Entertainment
Food
Boarding
Reviews
Jim,Nov 2025
AVL - ATL
Comfort
Crew
Overall
Entertainment
Food
Boarding
Reviews
Jim,Nov 2025
AVL - ATL
Comfort
Crew
Overall
Entertainment
Food
Boarding
Reviews
Jim,Nov 2025
AVL - ATL
Comfort
Crew
Overall
Entertainment
Food
Boarding
Reviews
Jim,Nov 2025
AVL - ATL
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$244 | Average$780 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$361 | Average$629 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$373 | Average$796 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$377 | Average$708 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$396 | Average$746 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$423 | Average$701 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$592 | Average$838 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$670 | Average$907 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$862 | Average$1,415 | FlexibilityNo cancel fee | On-time62% |