$172+ Cheap flights from Miami to Sioux Falls (MIA - FSD)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/29. Fares are subject to change and may not be available on all flights or dates of travel.
MIA — FSD
Sep 10 — Sep 171
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Miami to Sioux Falls with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Miami to Sioux Falls
Cheapest
Best
Last-minute
One-way
Cheapest flights from Miami to Sioux FallsExplore the most affordable flight options available from Miami to Sioux Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 11, 2026.
Explore the most affordable flight options available from Miami to Sioux Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 11, 2026.
This Orbitz deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/217:20 am -
1 stop12h 16m
Mon 10/267:31 pm -
1 stop9h 17m
Deal found 8/9![Frontier logo]()
$240
This Expedia deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/246:00 am -
1 stop15h 01m
Fri 8/288:56 pm -
1 stop6h 56m
Deal found 8/8![Frontier logo]()
$290
This American Airlines deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/32:05 pm -
1 stop9h 02m
Tue 9/812:06 pm -
1 stop9h 11m
Deal found 8/9![American Airlines logo]()
$359
This American Airlines deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/45:20 pm -
2 stops8h 10m
Tue 9/812:06 pm -
1 stop9h 11m
Deal found 8/9![American Airlines logo]()
$364
This American Airlines deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:56 pm -
1 stop6h 45m
Mon 10/2612:12 pm -
1 stop7h 35m
Deal found 8/9![American Airlines logo]()
$365
This Kiwi.com deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/227:27 pm -
2 stops24h 09m
Mon 10/267:31 pm -
1 stop9h 17m
Deal found 8/9![Frontier logo]()
$375
This Kiwi.com deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/127:20 am -
1 stop12h 16m
Mon 10/267:31 pm -
2 stops15h 34m
Deal found 8/10![Frontier logo]()
$386
This American Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/275:20 am -
1 stop7h 57m
Wed 9/212:06 pm -
1 stop9h 11m
Deal found 8/10![American Airlines logo]()
$394
This United Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2711:30 am -
2 stops12h 52m
Wed 9/26:00 am -
2 stops8h 55m
Deal found 8/10![United Airlines logo]()
$404
This Kiwi.com deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/286:00 am -
1 stop15h 01m
Sun 8/3010:00 pm -
2 stops24h 41m
Deal found 8/10![Multiple Airlines logo]()
$423
This Delta deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/286:40 am -
1 stop6h 58m
Sat 8/291:26 pm -
1 stop6h 32m
Deal found 8/10![Delta logo]()
$429
Best flights from Miami to Sioux FallsDiscover carefully curated flight deals from Miami to Sioux Falls that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 11, 2026.
Discover carefully curated flight deals from Miami to Sioux Falls that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 11, 2026.
This American Airlines deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/33:30 pm -
1 stop7h 37m
Thu 9/1012:56 pm -
1 stop7h 03m
Deal found 8/6![American Airlines logo]()
$359
This Delta deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/212:30 pm -
1 stop6h 02m
Wed 10/285:10 am -
1 stop7h 15m
Deal found 8/9![Delta logo]()
$359
This United Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/271:44 pm -
2 stops10h 38m
Sun 8/306:00 am -
1 stop8h 56m
Deal found 8/10![United Airlines logo]()
$434
This American Airlines deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/32:05 pm -
1 stop9h 02m
Tue 9/812:06 pm -
1 stop9h 11m
Deal found 8/9![American Airlines logo]()
$359
This American Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/105:25 am -
1 stop7h 51m
Wed 9/166:00 am -
1 stop7h 24m
Deal found 8/10![American Airlines logo]()
$359
This Delta deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/228:10 am -
2 stops12h 22m
Mon 10/265:10 am -
2 stops9h 09m
Deal found 8/9![Delta logo]()
$429
This United Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/153:52 pm -
1 stop8h 52m
Sat 9/197:47 am -
1 stop6h 04m
Deal found 8/10![United Airlines logo]()
$459
This Delta deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/211:19 pm -
2 stops11h 03m
Mon 10/265:10 am -
2 stops9h 09m
Deal found 8/9![Delta logo]()
$429
This United Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/101:44 pm -
2 stops10h 28m
Wed 9/167:47 am -
2 stops10h 05m
Deal found 8/10![United Airlines logo]()
$493
Last-minute flights from Miami to Sioux FallsDiscover last-minute flight deals from Miami to Sioux Falls. Data last updated August 11, 2026 and is based on user searches.
Discover last-minute flight deals from Miami to Sioux Falls. Data last updated August 11, 2026 and is based on user searches.
This Expedia deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/246:00 am -
1 stop15h 01m
Fri 8/288:56 pm -
1 stop6h 56m
Deal found 8/8![Frontier logo]()
$290
This American Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/275:20 am -
1 stop7h 57m
Wed 9/212:06 pm -
1 stop9h 11m
Deal found 8/10![American Airlines logo]()
$394
This United Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2711:30 am -
2 stops12h 52m
Wed 9/26:00 am -
2 stops8h 55m
Deal found 8/10![United Airlines logo]()
$404
This United Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/271:44 pm -
2 stops10h 38m
Sun 8/306:00 am -
1 stop8h 56m
Deal found 8/10![United Airlines logo]()
$434
This Kiwi.com deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/286:00 am -
1 stop15h 01m
Sun 8/3010:00 pm -
2 stops24h 41m
Deal found 8/10![Multiple Airlines logo]()
$423
This Delta deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/286:40 am -
1 stop6h 58m
Sat 8/291:26 pm -
1 stop6h 32m
Deal found 8/10![Delta logo]()
$429
This United Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/283:52 pm -
1 stop8h 52m
Sat 8/297:47 am -
2 stops13h 47m
Deal found 8/10![United Airlines logo]()
$430
This American Airlines deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/32:05 pm -
1 stop9h 02m
Tue 9/812:06 pm -
1 stop9h 11m
Deal found 8/9![American Airlines logo]()
$359
This American Airlines deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/45:20 pm -
2 stops8h 10m
Tue 9/812:06 pm -
1 stop9h 11m
Deal found 8/9![American Airlines logo]()
$364
This United Airlines deal was found by Cheapflights users on 8/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/251:15 pm -
2 stops10h 56m
Sun 9/277:50 am -
1 stop6h 09m
Deal found 8/10![United Airlines logo]()
$442
One-way flights from Miami to Sioux FallsSearch for one-way flight options from Miami to Sioux Falls. Find affordable one-way fares based on user searches. Data last updated August 11, 2026.
Search for one-way flight options from Miami to Sioux Falls. Find affordable one-way fares based on user searches. Data last updated August 11, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/297:17 pm -
2 stops25h 36m
Deal found 8/7![Frontier logo]()
$172
This Kiwi.com deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/296:45 am -
3 stops37h 34m
Deal found 8/7![Multiple Airlines logo]()
$179
This Kiwi.com deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/36:50 am -
2 stops38h 11m
Deal found 8/6![Frontier logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/311:10 am -
3 stops33h 11m
Deal found 8/6![Multiple Airlines logo]()
$305
This American Airlines deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/310:05 pm -
1 stop14h 31m
Deal found 8/6![American Airlines logo]()
$344
This deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/64:01 pm -
1 stop8h 10m
Deal found 8/9![United Airlines logo]()
$379
This Delta deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/166:40 am -
1 stop6h 58m
Deal found 8/8![Delta logo]()
$485
This Delta deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/166:00 am -
1 stop7h 09m
Deal found 8/7![Delta logo]()
$739
This United Airlines deal was found by Cheapflights users on 8/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/164:01 pm -
1 stop8h 10m
Deal found 8/7![United Airlines logo]()
$749
Find flight deals from Miami to Sioux Falls
Discover tips and strategies to find the most affordable flight options for your journey from Miami (MIA) to Sioux Falls (FSD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 11, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $240 (Orbitz) |
One-way from | $172 (Kiwi.com) |
Cheapflights Fare Finder
Customize your flight search to find flights from Miami to Sioux Falls that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 11, 2026.
Use the filters below to find and compare flights from Miami to Sioux Falls that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
MiamiSioux Falls
MIA Miami - FSD Sioux Falls Joe Foss Field
MIAFSD
Miami
Thu 9/3
3:30 pm-10:07 pm
1 stop7h 37m
Sioux Falls Joe Foss Field
Thu 9/10
12:56 pm-8:59 pm
1 stop7h 03m
$359
Quickest round-trip
MiamiSioux Falls
MIA Miami - FSD Sioux Falls Joe Foss Field
MIAFSD
Miami
Wed 10/21
2:30 pm-7:32 pm
1 stop6h 02m
Sioux Falls Joe Foss Field
Wed 10/28
5:10 am-1:25 pm
1 stop7h 15m
$359
MiamiSioux Falls
MIA Miami - FSD Sioux Falls Joe Foss Field
MIAFSD
Miami
Thu 9/3
2:05 pm-10:07 pm
1 stop9h 02m
Sioux Falls Joe Foss Field
Tue 9/8
12:06 pm-10:17 pm
1 stop9h 11m
$359
MiamiSioux Falls
MIA Miami - FSD Sioux Falls Joe Foss Field
MIAFSD
Miami
Thu 9/10
5:25 am-12:16 pm
1 stop7h 51m
Sioux Falls Joe Foss Field
Wed 9/16
6:00 am-2:24 pm
1 stop7h 24m
$359
MiamiSioux Falls
MIA Miami - FSD Sioux Falls Joe Foss Field
MIAFSD
Miami
Thu 10/22
8:10 am-7:32 pm
2 stops12h 22m
Sioux Falls Joe Foss Field
Mon 10/26
5:10 am-3:19 pm
2 stops9h 09m
$429
MiamiSioux Falls
MIA Miami - FSD Sioux Falls Joe Foss Field
MIAFSD
Miami
Wed 10/21
1:19 pm-11:22 pm
2 stops11h 03m
Sioux Falls Joe Foss Field
Mon 10/26
5:10 am-3:19 pm
2 stops9h 09m
$429
MiamiSioux Falls
MIA Miami - FSD Sioux Falls Joe Foss Field
MIAFSD
Miami
Thu 8/27
1:44 pm-11:22 pm
2 stops10h 38m
Sioux Falls Joe Foss Field
Sun 8/30
6:00 am-3:56 pm
1 stop8h 56m
$434
MiamiSioux Falls
MIA Miami - FSD Sioux Falls Joe Foss Field
MIAFSD
Miami
Tue 9/15
3:52 pm-11:44 pm
1 stop8h 52m
Sioux Falls Joe Foss Field
Sat 9/19
7:47 am-2:51 pm
1 stop6h 04m
$459
MiamiSioux Falls
MIA Miami - FSD Sioux Falls Joe Foss Field
MIAFSD
Miami
Thu 9/10
1:44 pm-11:12 pm
2 stops10h 28m
Sioux Falls Joe Foss Field
Wed 9/16
7:47 am-6:52 pm
2 stops10h 05m
$493
Cheapest one-way
MiamiSioux Falls
MIA Miami - FSD Sioux Falls Joe Foss Field
MIAFSD
Miami
Thu 9/3
6:50 am-8:01 pm
2 stops38h 11m
$190
Showing 1-10 of 17 resultsSorted by cheapest first
Compare providers for flights from Miami to Sioux Falls
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Miami to Sioux Falls in August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Miami-Sioux Falls flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Miami-Sioux Falls flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Miami-Sioux Falls flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Miami-Sioux Falls flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Miami-Sioux Falls flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Miami to Sioux Falls
Have a flexible travel schedule? Discover the best time to fly to Sioux Falls from Miami with our price prediction graph.
MIA-FSD
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Related info for your journey
Find useful and relevant information for your journey from Miami to Sioux Falls. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Sioux Falls?
Book flights to Sioux Falls if you plan to visit one of these locationsMarshall
Yankton
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from Miami
Popular flights
Sioux Falls flight routes