Statistics on Dublin-Saint Lucia (Castries) flights: what is the right price and when to buy your plane ticket?
Best time to go: what is the RIGHT price for a round-trip flight to Saint Lucia (Castries) (from: Dublin)
The average price to go to Saint Lucia (Castries) from Dublin airport is $ 1037 (round trip). However, there are variations depending on the departure month. Thus, it is possible to pay for your plane ticket on average between $ 843 (in march) and $ 1292 (in december), which is a saving of $ 195 or a surplus of $ 256 (compared to the average price) depending on the period you leave.
The analysis of all prices reveals that the most frequent price is between $664 to $719 and it is generally more economical to leave on a thursday and return on a sunday on a flight with 1 or more layovers.
Be careful, the cheapest months may correspond to unfavorable weather periods . Check out our page best time to go to Saint Lucia (Castries) before booking your flight.
If you want to know when to book your flight at the best price, go straight to the second part of this page: When to buy your Dublin-Saint Lucia (Castries) plane ticket.
How are these data calculated?
We have studied a sample of 16465 airfare prices from previous years for flights to Saint Lucia (Castries) from Dublin and can thus establish precise and credible price variation trends based on different parameters. Of course, prices can vary from year to year, but the seasonal aspect of this data (recurrence of school holidays, events... from year to year) makes these statistics quite reliable.
Average price depending on the departure month
Data analysis:
By leaving in march, the price of the plane ticket will statistically be the cheapest ($ 843, saving $ 195 compared to the average price over the year which is $ 1037). Conversely, december will be the most expensive ($ 1292).
Flight Dublin-Saint Lucia (Castries): when is the best time to go for the best price?
| Month | Good price* | Average price | Our opinion |
|---|---|---|---|
| January | $ 799 | $ 952 | good price |
| February | $ 811 | $ 1076 | fair price |
| March | $ 720 | $ 843 the cheapest | very good price |
| April | $ 896 | $ 1180 | high price |
| May | $ 777 | $ 934 | good price |
| June | $ 759 | $ 949 | good price |
| July | $ 934 | $ 1205 | high price |
| August | $ 1051 | $ 1250 | high price |
| September | $ 715 | $ 883 | good price |
| October | $ 787 | $ 995 | fair price |
| November | $ 725 | $ 881 | good price |
| December | $ 992 | $ 1292 the most expensive | very high price |
*great price to buy your plane ticket: if you see this price or cheaper during your flight search, go for it and buy it!
Price breakdown to travel from Dublin to Saint Lucia (Castries)
Data analysis:
The prices for flights from Dublin to Saint Lucia (Castries) range from $497 to $1603. 2% of tickets were purchased at the minimum price (from $498 to $553), 1% at the maximum price (from $1548 to $1603). The majority of plane tickets were purchased in the range of $719 to $774 (11% of tickets).
Cheapest airlines for the Dublin->Saint Lucia flight
There are 7 companies that serve Dublin from Saint Lucia (Castries) airport: British Airways, Aer Lingus, Air Canada, Ryanair, KLM, Delta and Air France.
Data analysis:
Of the 16465 flights analyzed in previous years, British Airways was the airline that offered the best fare most often in the flight ticket search results (52% of the time) on the Dublin->Saint Lucia route.
Which day of the week to leave?
Data analysis:
Statistically, Dublin-Saint Lucia (Castries) flights departing on a thursday are cheaper than on other days of the week. By choosing a thursday as your departure date, you can save an average of $49. On the other hand, departing on a friday may cost you an additional $39.
Which day of the week to come back?
Data analysis:
Statistically, return flights from Saint Lucia (Castries) to Dublin departing on a sunday are cheaper than on other days of the week. By choosing a sunday for your return date, you will save an average of $77. Conversely, departing from Saint Lucia (Castries) on a saturday may cost you an additional $88.
Top prices Dublin-Saint Lucia (Castries)
| Round trip | Dates | Price | |
|---|---|---|---|
| Dublin → Castries | 26-06 to 30-06-2025 | $ 635 | layover flight with British Airways |
| Dublin → Castries | 01-09 to 14-09-2025 | $ 652 | layover flight with British Airways |
| Dublin → Castries | 07-10 to 12-10-2025 | $ 566 | layover flight with British Airways |
| Dublin → Castries | 10-10 to 16-10-2025 | $ 660 | layover flight with British Airways |
| Dublin → Castries | 01-11 to 15-11-2025 | $ 634 | layover flight with British Airways |
| Dublin → Castries | 10-11 to 19-11-2025 | $ 597 | layover flight with British Airways |
| Dublin → Castries | 12-01 to 19-01-2026 | $ 667 | layover flight with British Airways |
| Dublin → Castries | 13-01 to 21-01-2026 | $ 686 | layover flight with British Airways |
| Dublin → Castries | 17-01 to 26-01-2026 | $ 645 | layover flight with British Airways |
| Dublin → Castries | 18-01 to 25-01-2026 | $ 662 | layover flight with British Airways |
When to book your flight Dublin - Saint Lucia (Castries) to get the cheapest price?
Statistically, you will make the biggest savings by buying your plane ticket between 7 to 8 months in advance. However, you may end up paying a high price if you book between 11 to 12 months in advance.
Did you know: the price of plane tickets not only varies depending on how far in advance you book, but also on the day of the week you book! So, to maximize your chances of getting the best price for a Dublin-Saint Lucia flight, it is recommended to book your ticket on a saturday.
How far in advance should I buy my flight?
Data analysis:
To get the cheapest flight ticket from Dublin to Saint Lucia (Castries), it is recommended to buy it 7 to 8 months before departure (it is then on average 991 $, which is a saving of 46 $ compared to the overall average price). On the other hand, if you buy your ticket 11 to 12 months in advance, you will pay the full price (285 $ more than the average price).
Depending on the departure month
The best time to buy your Dublin to Saint Lucia (Castries) flight ticket may vary depending on your departure month. Therefore, we offer you statistics on when to book your flight month by month.
| Departure on... | How far in advance should I book? |
|---|---|
| January | Best time: 10 to 11 months before departure (average price: 910 $) Other interesting period(s): 0 to 1 month ($ 927), 1 to 2 months ($ 943) |
| February | Best time: 1 to 2 months before departure (average price: 1003 $) Other interesting period(s): 0 to 1 month ($ 1051), 2 to 3 months ($ 1047) |
| March | Best time: 1 to 2 months before departure (average price: 801 $) Other interesting period(s): 2 to 3 months ($ 827) |
| April | Best time: 6 to 7 months before departure (average price: 1056 $) Other interesting period(s): 2 to 3 months ($ 1150), 3 to 4 months ($ 1090), 4 to 5 months ($ 1083), 5 to 6 months ($ 1081), 7 to 8 months ($ 1095), 8 to 9 months ($ 1131), 9 to 10 months ($ 1092) |
| May | Best time: 5 to 6 months before departure (average price: 857 $) Other interesting period(s): 1 to 2 months ($ 912), 3 to 4 months ($ 883), 6 to 7 months ($ 900) |
| June | Best time: 8 to 9 months before departure (average price: 892 $) Other interesting period(s): 0 to 1 month ($ 908), 1 to 2 months ($ 911), 2 to 3 months ($ 903), 5 to 6 months ($ 941), 6 to 7 months ($ 920) |
| July | Best time: 5 to 6 months before departure (average price: 1131 $) Other interesting period(s): 1 to 2 months ($ 1205), 3 to 4 months ($ 1172), 4 to 5 months ($ 1162), 7 to 8 months ($ 1166), 8 to 9 months ($ 1152) |
| August | Best time: 3 to 4 months before departure (average price: 1074 $) Other interesting period(s): 1 to 2 months ($ 1199), 2 to 3 months ($ 1206), 4 to 5 months ($ 1208), 6 to 7 months ($ 1190), 7 to 8 months ($ 1143) |
| September | Best time: 8 to 9 months before departure (average price: 804 $) Other interesting period(s): 1 to 2 months ($ 862), 2 to 3 months ($ 829), 3 to 4 months ($ 861), 4 to 5 months ($ 876), 5 to 6 months ($ 876), 6 to 7 months ($ 866), 7 to 8 months ($ 855) |
| October | Best time: 9 to 10 months before departure (average price: 864 $) Other interesting period(s): 2 to 3 months ($ 973), 3 to 4 months ($ 961), 4 to 5 months ($ 948), 7 to 8 months ($ 877), 8 to 9 months ($ 913) |
| November | Best time: 7 to 8 months before departure (average price: 750 $) Other interesting period(s): 1 to 2 months ($ 875), 2 to 3 months ($ 811), 3 to 4 months ($ 817), 5 to 6 months ($ 783), 8 to 9 months ($ 787), 9 to 10 months ($ 846), 10 to 11 months ($ 849) |
| December | Best time: 1 to 2 months before departure (average price: 1164 $) Other interesting period(s): 0 to 1 month ($ 1268), 3 to 4 months ($ 1253), 5 to 6 months ($ 1255), 7 to 8 months ($ 1278) |
What day of the week should I book my flight ticket?
Data analysis:
Statistically, saturday is the day when plane tickets for Dublin->Saint Lucia are the cheapest. So, by buying your plane ticket on a saturday, you will save $23. Conversely, by buying it on a sunday, you may end up paying $23 more.
Dublin to Saint Lucia (Castries): flight price when booking today
Information: this data is not statistics but comes from real prices collected less than 7 days ago. Some months may not be available as we do not have enough data for them.
| Month | Current price | Our opinion | |
|---|---|---|---|
| April 2025 | $ 1266 $762 to $1830 | high price | Find a flight |
| May 2025 | $ 896 $707 to $1520 | very good price | Find a flight |
| June 2025 | $ 892 $635 to $1674 | very good price | Find a flight |
| July 2025 | $ 743 $722 to $784 | very good price | Find a flight |
| August 2025 | $ 1204 $1121 to $1364 | very good price | Find a flight |
| September 2025 | $ 652 $652 to $652 | very good price | Find a flight |
| October 2025 | $ 719 $566 to $967 | very good price | Find a flight |
| November 2025 | $ 610 $597 to $634 | very good price | Find a flight |
| December 2025 | $ 929 $898 to $944 | very good price | Find a flight |
| January 2026 | $ 785 $645 to $1039 | very good price | Find a flight |
| February 2026 | $ 783 $676 to $988 | very good price | Find a flight |
| March 2026 | $ 757 $713 to $819 | very good price | Find a flight |
Data analysis:
Compared to the average price, may, june, july, august, september, october, november, december, january, february and march are cheaper to travel to Saint Lucia (Castries). So it may be interesting to book now to leave during these months!