United Airlines Flight Reservations, Changes & Upgrades
Economy Plus, United First & Polaris Business — cash, miles, or Premier complimentary upgrades.
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United Upgrades & Premium Cabins DeskEconomy Plus · United First · Polaris · MileagePlus
United Airlines Reservations
Search live fares — or call us 24/7 to upgrade to Economy Plus, United First, or Polaris Business Class.
Why Choose Us?
- Live Upgrade Inventory Check – We access real-time United seat availability across all cabin classes before quoting you.
- Cash & Miles Comparison – We compare cash upgrade prices against MileagePlus redemption rates so you choose the best value.
- Premier Status Check – We verify your Premier upgrade waitlist position and push for the best available complimentary upgrade.
- International Polaris Experts – Polaris upgrades on transatlantic and transpacific routes handled accurately and efficiently.
- 24/7 Availability – Upgrade availability changes by the hour. We act fast so you don't miss the window.
United Airlines Upgrade Pricing Guide
Approximate costs for cash upgrades and MileagePlus redemptions by cabin class.
| From Cabin | Upgrade To | Cash Price | MileagePlus | Complimentary |
|---|---|---|---|---|
| Economy | Economy Plus® | ~$20–$80 | 500–5,000 miles | Premier Silver+ |
| Economy | United First® (Dom.) | ~$75–$300 | 5,000–20,000 miles | Premier Gold+ |
| Economy | Premium Plus (Intl.) | ~$200–$700 | 10,000–50,000 miles | Premier Platinum+ |
| Economy | United Polaris® | ~$400–$1,500 | 20,000–100,000 miles | Premier 1K |
| Economy Plus® | United First® (Dom.) | ~$50–$250 | 3,000–15,000 miles | Premier Gold+ |
| Economy Plus® | United Polaris® | ~$300–$1,200 | 15,000–80,000 miles | Premier 1K |
* Prices are approximate and vary by route, availability, and booking timing. Call us for a live quote on your specific flight.
Search United Flights & Upgrade Options
Check available flights — then call us to lock in your upgrade on the same call.
United Airlines Premium Cabin Classes
Every United upgrade option explained — from extra legroom to lie-flat beds.
Economy Plus®
- 5–6 inches of extra legroom
- Dedicated overhead bin space
- Early boarding
- Faster deplaning
- Available on most United flights
- From ~$20–$80 domestic
United First®
- Fully reclining seat (domestic)
- Complimentary meals & premium drinks
- Priority check-in & boarding
- 2 free checked bags
- From ~$75–$300 domestic
United Premium Plus
- Wider seat with recline
- Adjustable footrest & leg rest
- Premium meal service
- Priority boarding
- Select international routes
- From ~$200–$700
United Polaris®
- Fully lie-flat seat (direct aisle)
- Saks Fifth Avenue bedding
- United Polaris Lounge access
- Chef-curated multi-course dining
- Therabody sleep kit
- From ~$400–$1,500+
Every Way to Upgrade Your United Flight
Cash, miles, complimentary, or at the gate — we handle all of them.
Cash Upgrade
Pay fare difference or a set upgrade amount
MileagePlus Upgrade
Redeem award miles for Economy Plus through Polaris
Premier Upgrade
Complimentary for Silver, Gold, Platinum & 1K
Gate Upgrade
Last-minute upgrades at the departure gate
Check-In Upgrade
Bid or purchase upgrades during online check-in
International Upgrade
Premium Plus or Polaris on long-haul routes
Card Holder Upgrade
United Explorer & Quest card holders earn upgrade priority
Star Alliance Upgrade
Earn miles on Lufthansa, ANA & Air Canada upgrades
Popular United Airlines Routes
United connects the US to major destinations across Europe, Asia, Latin America, and beyond.
New York (EWR) → London (LHR)UpgradeChicago (ORD) → Los Angeles (LAX)UpgradeHouston (IAH) → Mexico City (MEX)UpgradeSan Francisco (SFO) → Tokyo (NRT)UpgradeNewark (EWR) → Amsterdam (AMS)UpgradeDenver (DEN) → New York (EWR)UpgradeChicago (ORD) → Frankfurt (FRA)UpgradeLos Angeles (LAX) → Sydney (SYD)UpgradeWashington (IAD) → Paris (CDG)UpgradeNewark (EWR) → Miami (MIA)UpgradeHouston (IAH) → Bogotá (BOG)UpgradeSan Francisco (SFO) → Singapore (SIN)Upgrade
How to Upgrade Your United Flight with Book Aero Fare
1
Call Our Toll-Free Line
Dial +1(800) 903-1468 — available 24/7, no hold times.
2
Share Your Booking Reference
Provide your 6-character United confirmation code and passenger name.
3
We Check Live Upgrade Inventory
Our agent pulls real-time seat availability in Economy Plus, United First, and Polaris for your flight.
4
We Compare All Your Options
We show you cash prices, MileagePlus costs, and complimentary eligibility side-by-side.
5
Upgrade Confirmed Instantly
Approve and we reissue your updated e-ticket with the new cabin assignment immediately.
Premium Seats Fill Up Fast — Check Availability Now
Polaris and United First inventory changes by the hour. The sooner you call, the more options we can secure.
+1(800) 903-1468 — Check My UpgradeUnited Airlines Upgrades — Frequently Asked Questions
How do I upgrade my United Airlines seat?
United seat upgrades can be requested at booking, post-ticketing, at check-in, or at the gate. Options include paying cash, using MileagePlus miles, or receiving a complimentary upgrade as a Premier status member. Calling us is the fastest way to check live upgrade availability and process the upgrade on the spot.
How much does a United Airlines upgrade cost?
Costs vary by route, cabin, and timing. Economy Plus upgrades can be as low as $20–$80 on short domestic routes. United First upgrades range from $75–$300 domestically. International Polaris upgrades can range from $400–$1,500+. MileagePlus upgrades require 500–100,000 miles depending on the route and cabin. Call us for a live quote.
Can I upgrade using MileagePlus miles?
Yes. United offers MileagePlus upgrade awards for Economy Plus, United First, Premium Plus, and Polaris Business on eligible flights. Award availability is separate from cash upgrade inventory. Premier members receive upgrade priority. Call us with your MileagePlus balance and we'll check award inventory.
What is United Economy Plus®?
Economy Plus is United's premium economy section offering 5–6 additional inches of legroom compared to standard Economy. It includes early boarding, dedicated overhead bin space, and priority deplaning. It's available on most United flights and is the most affordable upgrade option.
What is United Polaris® Business Class?
United Polaris is United's flagship international Business Class product. Features include fully lie-flat seats with direct aisle access on international flights, Saks Fifth Avenue bedding and duvet, multi-course chef-curated meals, United Polaris Lounge access at major hubs, and premium Therabody sleep kits. It's one of North America's top Business Class products.
What is United Premium Plus?
United Premium Plus is a Premium Economy cabin available on select international long-haul routes. It offers wider seats with more recline than Economy Plus, adjustable leg rests and footrests, premium meal service, and priority boarding. It sits between Economy Plus and Polaris in price and comfort.
How do complimentary upgrades work for Premier members?
United Premier members are eligible for complimentary upgrades on domestic and select near-international flights. The upgrade window opens based on status tier: Premier 1K members clear earliest (100 hours before), followed by Platinum (72 hrs), Gold (48 hrs), and Silver (24 hrs). Higher status = higher priority on the upgrade waitlist. Call us to check your position.
Can I upgrade a Basic Economy ticket?
No. United Basic Economy tickets are not eligible for seat upgrades at any time — not even Economy Plus. If you want the ability to upgrade, you must book Main Cabin or higher. If you've already purchased Basic Economy, the only option is to cancel within 24 hours and rebook at a higher fare class. Call us immediately if this applies to you.
Can I upgrade an international United flight?
Yes. Upgrades to Premium Plus and United Polaris are available on eligible transatlantic and transpacific routes. Cash and MileagePlus upgrade requirements are higher than domestic, but the comfort gap is significant. Our agents check live international upgrade inventory across all United hubs including EWR, ORD, IAH, SFO, and IAD.
When is the best time to buy a United upgrade?
Upgrade prices are dynamic and fluctuate based on demand and advance notice. Prices sometimes drop within 24 hours of departure as United fills premium seats. However, for popular Polaris routes, inventory is limited — buying early is safer. Our agents advise on the best timing for your specific route.
Does Book Aero Fare charge a fee for upgrade assistance?
No. Book Aero Fare does not charge an agency fee for upgrade processing. You pay only what United charges — whether cash or MileagePlus miles. All costs are disclosed before we process anything.
Is Book Aero Fare affiliated with United Airlines?
No. Book Aero Fare is operated by People Information LLC, an independent travel agency. We are not affiliated with or endorsed by United Airlines, Inc.
Independent Travel Agency Disclosure
BookAeroFare.com is operated by People Information LLC (2101 W San Juan Ave Suite 2, Phoenix, AZ 85015). Not affiliated with United Airlines, Inc.
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