$250 off United Airline E-coupon
要价$200,不议价。明年Feb19前都能用
United Airline 的电子优惠券，美国境内单张机票直降$250。注意，是境内，只能用
在一张机票上。有问题请参考terms and conditions，站内短信联系。
补充说明:
Paypal我费用之后，我会把E-coupon email给你。以下是使用说明，terms and
conditions
How to redeem at a later date:
1.Go to united.com/shopforflights
2.Enter your origin and destination information.
3.Select your travel dates and enter your e-certificate number.
4.Select your flights. All selected flights must be e-certificate eligible
to receive your discount.
5.Choose
