| Skywriting? |
| USPS option |
| Flying post? |
| Some postage |
| Fast delivery |
| Postal option |
| Post by plane |
| Kind of stamp |
| Postal service |
| Kind of postage |
| Sender's option |
| Speedy delivery |
| Post-office stamp |
| Young Lindy's cargo |
| Fast delivery option |
| It can make Time fly |
| Letters sent by plane |
| Letter delivery system |
| Letters taken by plane |
| Lindbergh's cargo in 1926 |
| Means to a speedy delivery |
| Service begun May 15, 1918 |
| Fast letter transportation |
| Communication means since 1911 |
| Letters and packages sent by plane |
| Its first stamps were issued in 1918 |