Airline fee credit 은 요 글을 참고하셔요. https://www.milemoa.com/bbs/board/3709856 

$250 Airline Fee Credit

Benefit is available to Hilton Honors Aspire Card Members only. To receive statement credits of up to $250 per calendar year toward incidental air travel fees, Card Member must select one qualifying airline at www.americanexpress.com/airlinecreditchoice. Only the Basic Card Member or Authorized Account Manager(s) on the Card Account can select the qualifying airline. Card Members who have not chosen one qualifying airline will be able to do so at any time. Card Members who have already selected one qualifying airline will be able to change their choice one time each year in January at www.americanexpress.com/airlinecreditchoice or by calling the number on the back of the Card. Card Members who do not change their airline selection will remain with their current airline. Statement Credits: Incidental air travel fees must be charged to the Card Member on the eligible Card Account for the benefit to apply. Purchases made by both the Basic and Additional Card Members on the eligible Card Account are eligible for statement credits. However, each Card Account is eligible for up to a total of $250 per calendar year in statement credits across all Cards on the Card Account. Incidental air travel fees must be separate charges from airline ticket charges. Fees not charged by the Card Member's airline of choice (e.g. wireless internet and fees incurred with airline alliance partners) do not qualify for statement credits. Incidental air travel fees charged prior to selection of a qualifying airline are not eligible for statement credits. Airline tickets, upgrades, mileage points purchases, mileage points transfer fees, gift cards, duty free purchases, and award tickets are not deemed to be incidental fees. The airline must submit the charge under the appropriate merchant code, industry code, or required service or product identifier for the charge to be recognized as an incidental air travel fee. Please allow 2-4 weeks after the qualifying incidental air travel fee is charged to your Card Account for statement credit(s) to be posted to the Card Account. We rely on airlines to submit the correct information on airline transactions, so please call the number on the back of the Card if statement credits have not posted after 4 weeks from the date of purchase. Card Members remain responsible for timely payment of all charges.

$250 Hilton Resort Credit

During each year of your Card Membership ("reward year"), you are eligible to receive up to $250 total in statement credits on your Card Account for eligible purchases made directly with participating Hilton Resorts with your Hilton Honors American Express Aspire Card during that reward year. Your first reward year begins on your account opening date. Each subsequent reward year begins on the anniversary of your account opening date. 

Eligible Hilton Resort purchases must be made directly with the participating Hilton Resort and charged to your Hilton Honors American Express Aspire Card account for the benefit to apply. Incidental charges (including charges made at restaurants, spas, and other establishments within the hotel property) must be charged to your room and paid for with your Hilton Honors American Express Aspire Card at checkout in order for them to be recognized as Hilton Resort purchases. Visit hilton.com/resorts for the list of participating Hilton Resorts. Purchases made by both the Basic and Additional Card Members on the eligible Card Account are eligible for statement credits. However, each Card Account is eligible for up to a total of $250 per renewal year in statement credits across all Cards on the Card Account. Please allow 8-12 weeks after the eligible Hilton purchase is charged to your Card Account for statement credit(s) to be posted to the Account. Please call the number on the back of your Card if statement credits have not posted after 12 weeks from the date of purchase. Card Members remain responsible for timely payment of all charges.

일단 여행 크레딧은 비행기표 예약에는 사용 불가능합니다. 공식적으로는 업그레이드, 수하물 수수료, 라운지 이용 등에 사용 가능한데, 일부 기카가 됩니다. (이건 글타래가 따로 있어요)

그리고 별도로 그런 여행사를 통해서 예약할 경우, 직항의 경우에느 좀 문제가 덜한데, 만약 비행기가 결항되거나 문제가 생길 경우 서로 문제를 떠넘길 수 있으니, 아주 특별한 경우가 아니라면 그냥 항공사 공식 페이지에서 예약하시길 추천합니다.