Statistics on Sydney-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: Sydney)

The average price to go to Saint Lucia (Castries) from Sydney airport is $ 2519 (round trip). However, there are variations depending on the departure month. Thus, it is possible to pay for your plane ticket on average between $ 1932 (in march) and $ 3256 (in december), which is a saving of $ 588 or a surplus of $ 737 (compared to the average price) depending on the period you leave.

The analysis of all prices reveals that the most frequent price is between $2114 to $2168 and it is generally more economical to leave on a tuesday and return on a wednesday 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 Sydney-Saint Lucia (Castries) plane ticket.

How are these data calculated?

We have studied a sample of 2292 airfare prices from previous years for flights to Saint Lucia (Castries) from Sydney 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

Created with Highcharts 8.2.2 $2712 $2712 $2269 $2269 $1932 $1932 $2569 $2569 $2398 $2398 $2385 $2385 $2779 $2779 $2821 $2821 $2634 $2634 $2273 $2273 $2199 $2199 $3256 $3256Average price of round-trip airfare in USD according to the departure monthjan.feb.mar.apr.mayjun.jul.aug.sep.oct.nov.dec.17502000225025002750300032503500

Data analysis:

By leaving in march, the price of the plane ticket will statistically be the cheapest ($ 1932, saving $ 588 compared to the average price over the year which is $ 2519). Conversely, december will be the most expensive ($ 3256).

Flight Sydney-Saint Lucia (Castries): when is the best time to go for the best price?

Month Good price* Average price Our opinion
January$ 2125 $ 2712 fair price
February$ 1796 $ 2269 good price
March$ 1668 $ 1932 very good price
April$ 1999 $ 2569 fair price
May$ 1887 $ 2398 fair price
June$ 1978 $ 2385 fair price
July$ 2373 $ 2779 fair price
August$ 2362 $ 2821 fair price
September$ 1930 $ 2634 fair price
October$ 1975 $ 2273 good price
November$ 1765 $ 2199 good price
December$ 2741 $ 3256 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 Sydney to Saint Lucia (Castries)

Created with Highcharts 8.2.23%3%3%3%2%2%2%2%2%2%2%2%3%3%2%2%3%3%3%3%4%4%4%4%4%4%5%5%4%4%4%4%4%4%4%4%3%3%3%3%3%3%2%2%1%1%2%2%1%1%1%1%1%1%1%1%1%1%1%1%1%1%1%1%1%1%Percentage of plane tickets found at this price$1409 to …$1409 to $1464$1464 to $1518$1518 to $1572$1572 to $1626$1626 to $1680$1680 to $1734$1734 to $1789$1789 to $1843$1843 to $1897$1897 to $1951$1951 to $2005$2005 to $2060$2060 to $2114$2114 to $2168$2168 to $2222$2222 to $2276$2276 to $2331$2331 to $2385$2385 to $2439$2439 to $2493$2493 to $2547$2547 to $2601$2601 to $2656$2656 to $2710$2710 to $2764$2764 to $2818$2818 to $2872$2872 to $2927$2981 to $3035$3035 to $3089$3089 to $3143$3143 to $3198$3252 to $33060123456

Data analysis:

The prices for flights from Sydney to Saint Lucia (Castries) range from $1409 to $3306. 3% of tickets were purchased at the minimum price (from $1409 to $1464), 1% at the maximum price (from $3252 to $3306). The majority of plane tickets were purchased in the range of $2114 to $2168 (5% of tickets).

Cheapest airlines for the Sydney->Saint Lucia flight

There are 7 companies that serve Sydney from Saint Lucia (Castries) airport: British Airways, Jetstar, Qantas, Air Canada, Hawaiian Airlines, Asiana Airlines and ANA.

Created with Highcharts 8.2.2British Airways: 46 %British Airways: 46 %Jetstar: 10 %Jetstar: 10 %Qantas: 10 %Qantas: 10 %Air Canada: 8 %Air Canada: 8 %Hawaiian Airlines: 5 %Hawaiian Airlines: 5 %Asiana Airlines: 3 %Asiana Airlines: 3 %ANA: 2 %ANA: 2 %

Data analysis:

Of the 2292 flights analyzed in previous years, British Airways was the airline that offered the best fare most often in the flight ticket search results (46% of the time) on the Sydney->Saint Lucia route.

Which day of the week to leave?

Created with Highcharts 8.2.2 $ -69 $ -69 $ +105 $ +105 $ -131 $ -131 $ -101 $ -101 $ -9 $ -9 $ +4 $ +4 $ +175 $ +175Average airfare price according to the departure daya sundaya mondaya tuesdaya wednesdaya thursdaya fridaya saturday-150-100-50050100150200

Data analysis:

Statistically, Sydney-Saint Lucia (Castries) flights departing on a tuesday are cheaper than on other days of the week. By choosing a tuesday as your departure date, you can save an average of $131. On the other hand, departing on a saturday may cost you an additional $175.

Which day of the week to come back?

Created with Highcharts 8.2.2 $ -94 $ -94 $ -4 $ -4 $ -63 $ -63 $ -230 $ -230 $ -22 $ -22 $ +209 $ +209 $ +174 $ +174Average airfare price based on the return daya sundaya mondaya tuesdaya wednesdaya thursdaya fridaya saturday-300-200-1000100200300

Data analysis:

Statistically, return flights from Saint Lucia (Castries) to Sydney departing on a wednesday are cheaper than on other days of the week. By choosing a wednesday for your return date, you will save an average of $230. Conversely, departing from Saint Lucia (Castries) on a friday may cost you an additional $209.

Top prices Sydney-Saint Lucia (Castries)

Round tripDatesPrice
Sydney → Castries01-04 to 08-04-2025$ 2425 
Sydney → Castries19-04 to 25-04-2025$ 2671 
Sydney → Castries06-05 to 14-05-2025$ 2365 
Sydney → Castries10-06 to 21-06-2025$ 1733 
Sydney → Castries09-07 to 23-07-2025$ 2655 
Sydney → Castries02-08 to 09-08-2025$ 2271 
Sydney → Castries21-10 to 31-10-2025$ 1832 
Sydney → Castries01-12 to 08-12-2025$ 1957 

When to book your flight Sydney - Saint Lucia (Castries) to get the cheapest price?

Statistically, you will make the biggest savings by buying your plane ticket between 8 to 9 months in advance. However, you may end up paying a high price if you book between 0 to 1 month 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 Sydney-Saint Lucia flight, it is recommended to book your ticket on a tuesday.

How far in advance should I buy my flight?

Created with Highcharts 8.2.2 $2664 $2664 $2528 $2528 $2643 $2643 $2358 $2358 $2442 $2442 $2376 $2376 $2433 $2433 $2312 $2312 $2237 $2237 $2327 $2327 $2376 $2376Average airfare price based on the number of months between booking and flight0 to 1 month1 to 2 months2 to 3 months3 to 4 months4 to 5 months5 to 6 months6 to 7 months7 to 8 months8 to 9 months9 to 10 months10 to 11 months2100220023002400250026002700

Data analysis:

To get the cheapest flight ticket from Sydney to Saint Lucia (Castries), it is recommended to buy it 8 to 9 months before departure (it is then on average 2237 $, which is a saving of 282 $ compared to the overall average price). On the other hand, if you buy your ticket 0 to 1 month in advance, you will pay the full price (145 $ more than the average price).

Depending on the departure month

The best time to buy your Sydney 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: 1 to 2 months before departure (average price: 2594 $)
February

Best time: 0 to 1 month before departure (average price: 2049 $)
March-
April-
May-
June-
July-
August-
September-
October-
November

Best time: 0 to 1 month before departure (average price: 2140 $)

Other interesting period(s): 1 to 2 months ($ 2142)
December-

What day of the week should I book my flight ticket?

Created with Highcharts 8.2.2 $ -46 $ -46 $ +96 $ +96 $ -68 $ -68 $ -7 $ -7 $ +14 $ +14 $ -1 $ -1 $ +34 $ +34Average price of plane ticket according to the booking daysundaymondaytuesdaywednesdaythursdayfridaysaturday-100-50050100150

Data analysis:

Statistically, tuesday is the day when plane tickets for Sydney->Saint Lucia are the cheapest. So, by buying your plane ticket on a tuesday, you will save $68. Conversely, by buying it on a monday, you may end up paying $96 more.

Sydney 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
April 2025$ 2671
$2671 to $2671		Find a flight
May 2025$ 2365
$2365 to $2365		Find a flight
June 2025$ 1889
$1733 to $2044		Find a flight
July 2025$ 2655
$2655 to $2655		Find a flight
August 2025$ 2271
$2271 to $2271		Find a flight
October 2025$ 1832
$1832 to $1832		Find a flight
December 2025$ 1957
$1957 to $1957		Find a flight

Data analysis:

Compared to the average price, may, june, july, august, october and december are cheaper to travel to Saint Lucia (Castries). So it may be interesting to book now to leave during these months!

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